656425 has 36 divisors (see below), whose sum is σ = 1055488. Its totient is φ = 396000.

The previous prime is 656423. The next prime is 656429. The reversal of 656425 is 524656.

It is not a de Polignac number, because 656425 - 2¹ = 656423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656393 and 656402.

It is not an unprimeable number, because it can be changed into a prime (656423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21160 + ... + 21190.

2⁶⁵⁶⁴²⁵ is an apocalyptic number.

It is an amenable number.

656425 is a deficient number, since it is larger than the sum of its proper divisors (399063).

656425 is a wasteful number, since it uses less digits than its factorization.

656425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 54 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 656425 is about 810.2005924461. The cubic root of 656425 is about 86.9083899393.

Subtracting from 656425 its reverse (524656), we obtain a square (131769 = 363²).

It can be divided in two parts, 656 and 425, that added together give a triangular number (1081 = T₄₆).

The spelling of 656425 in words is "six hundred fifty-six thousand, four hundred twenty-five".