2457657 has 6 divisors (see below), whose sum is σ = 3549962. Its totient is φ = 1638432.

The previous prime is 2457647. The next prime is 2457667. The reversal of 2457657 is 7567542.

It is an interprime number because it is at equal distance from previous prime (2457647) and next prime (2457667).

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 1212201 = 1116^2 + 1101^2 .

It is not a de Polignac number, because 2457657 - 2⁴ = 2457641 is a prime.

It is a super-3 number, since 3×2457657³ = 44533319413042117179, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2457607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136528 + ... + 136545.

2^2457657 is an apocalyptic number.

It is an amenable number.

2457657 is a deficient number, since it is larger than the sum of its proper divisors (1092305).

2457657 is a wasteful number, since it uses less digits than its factorization.

2457657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273079 (or 273076 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 2457657 is about 1567.6916150825. The cubic root of 2457657 is about 134.9502697488.

The spelling of 2457657 in words is "two million, four hundred fifty-seven thousand, six hundred fifty-seven".