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7125985 = 52635419
BaseRepresentation
bin11011001011101111100001
3111102001000101
4123023233201
53311012420
6412422401
7114366316
oct33135741
914361011
107125985
114027949
122477a01
131626679
14d36d0d
1595b60a
hex6cbbe1

7125985 has 8 divisors (see below), whose sum is σ = 8585280. Its totient is φ = 5678064.

The previous prime is 7125983. The next prime is 7126069. The reversal of 7125985 is 5895217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7125985 - 21 = 7125983 is a prime.

It is a super-3 number, since 3×71259853 (a number of 22 digits) contains 333 as substring.

7125985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7125983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 4024.

It is an arithmetic number, because the mean of its divisors is an integer number (1073160).

Almost surely, 27125985 is an apocalyptic number.

It is an amenable number.

7125985 is a deficient number, since it is larger than the sum of its proper divisors (1459295).

7125985 is a wasteful number, since it uses less digits than its factorization.

7125985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687.

The product of its digits is 25200, while the sum is 37.

The square root of 7125985 is about 2669.4540640363. The cubic root of 7125985 is about 192.4339234619.

The spelling of 7125985 in words is "seven million, one hundred twenty-five thousand, nine hundred eighty-five".

Divisors: 1 5 263 1315 5419 27095 1425197 7125985