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4247405 = 5849481
BaseRepresentation
bin10000001100111101101101
321222210100022
4100030331231
52041404110
6231011525
751050051
oct20147555
97883308
104247405
112441158
121509ba5
13b59376
147c7c61
1558d755
hex40cf6d

4247405 has 4 divisors (see below), whose sum is σ = 5096892. Its totient is φ = 3397920.

The previous prime is 4247389. The next prime is 4247407. The reversal of 4247405 is 5047424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 3104644 = 1069^2 + 1762^2 .

It is not a de Polignac number, because 4247405 - 24 = 4247389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424736 + ... + 424745.

It is an arithmetic number, because the mean of its divisors is an integer number (1274223).

Almost surely, 24247405 is an apocalyptic number.

It is an amenable number.

4247405 is a deficient number, since it is larger than the sum of its proper divisors (849487).

4247405 is an equidigital number, since it uses as much as digits as its factorization.

4247405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849486.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 4247405 is about 2060.9233367595. The cubic root of 4247405 is about 161.9476155375.

It can be divided in two parts, 42 and 47405, that multiplied together give a triangular number (1991010 = T1995).

The spelling of 4247405 in words is "four million, two hundred forty-seven thousand, four hundred five".

Divisors: 1 5 849481 4247405