657472 has 14 divisors (see below), whose sum is σ = 1304798. Its totient is φ = 328704.

The previous prime is 657469. The next prime is 657473. The reversal of 657472 is 274756.

It can be written as a sum of positive squares in only one way, i.e., 484416 + 173056 = 696^2 + 416^2 .

It is not an unprimeable number, because it can be changed into a prime (657473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5073 + ... + 5200.

2⁶⁵⁷⁴⁷² is an apocalyptic number.

It is an amenable number.

657472 is a deficient number, since it is larger than the sum of its proper divisors (647326).

657472 is a wasteful number, since it uses less digits than its factorization.

657472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10285 (or 10275 counting only the distinct ones).

The product of its digits is 11760, while the sum is 31.

The square root of 657472 is about 810.8464712879. The cubic root of 657472 is about 86.9545717824.

The spelling of 657472 in words is "six hundred fifty-seven thousand, four hundred seventy-two".