Search a number
-
+
13907025 = 3352111873
BaseRepresentation
bin110101000011…
…010001010001
3222011112212000
4311003101101
512030011100
61214024213
7226131156
oct65032121
928145760
1013907025
117939610
1247a8069
132b5c012
141bc022d
15134a900
hexd43451

13907025 has 48 divisors (see below), whose sum is σ = 27885120. Its totient is φ = 6739200.

The previous prime is 13907009. The next prime is 13907027. The reversal of 13907025 is 52070931.

It is not a de Polignac number, because 13907025 - 24 = 13907009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13907025.

It is not an unprimeable number, because it can be changed into a prime (13907027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6489 + ... + 8361.

It is an arithmetic number, because the mean of its divisors is an integer number (580940).

Almost surely, 213907025 is an apocalyptic number.

13907025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13907025 is an abundant number, since it is smaller than the sum of its proper divisors (13978095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13907025 is a wasteful number, since it uses less digits than its factorization.

13907025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 13907025 is about 3729.2123833324. The cubic root of 13907025 is about 240.4795100707.

Adding to 13907025 its reverse (52070931), we get a palindrome (65977956).

The spelling of 13907025 in words is "thirteen million, nine hundred seven thousand, twenty-five".

Divisors: 1 3 5 9 11 15 25 27 33 45 55 75 99 135 165 225 275 297 495 675 825 1485 1873 2475 5619 7425 9365 16857 20603 28095 46825 50571 61809 84285 103015 140475 185427 252855 309045 421425 515075 556281 927135 1264275 1545225 2781405 4635675 13907025