657425 has 6 divisors (see below), whose sum is σ = 815238. Its totient is φ = 525920.

The previous prime is 657413. The next prime is 657431. The reversal of 657425 is 524756.

It can be written as a sum of positive squares in 3 ways, for example, as 36481 + 620944 = 191^2 + 788^2 .

It is not a de Polignac number, because 657425 - 2⁶ = 657361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 657425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13124 + ... + 13173.

It is an arithmetic number, because the mean of its divisors is an integer number (135873).

2⁶⁵⁷⁴²⁵ is an apocalyptic number.

It is an amenable number.

657425 is a deficient number, since it is larger than the sum of its proper divisors (157813).

657425 is a wasteful number, since it uses less digits than its factorization.

657425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26307 (or 26302 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 657425 is about 810.8174887112. The cubic root of 657425 is about 86.9524997234.

The spelling of 657425 in words is "six hundred fifty-seven thousand, four hundred twenty-five".