4157657 has 4 divisors (see below), whose sum is σ = 4751616. Its totient is φ = 3563700.

The previous prime is 4157623. The next prime is 4157663. The reversal of 4157657 is 7567514.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4157657 - 2¹² = 4153561 is a prime.

It is a super-2 number, since 2×4157657² = 34572223459298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4157617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296969 + ... + 296982.

It is an arithmetic number, because the mean of its divisors is an integer number (1187904).

Almost surely, 2^4157657 is an apocalyptic number.

It is an amenable number.

4157657 is a deficient number, since it is larger than the sum of its proper divisors (593959).

4157657 is an equidigital number, since it uses as much as digits as its factorization.

4157657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593958.

The product of its digits is 29400, while the sum is 35.

The square root of 4157657 is about 2039.0333494085. The cubic root of 4157657 is about 160.7988305691.

The spelling of 4157657 in words is "four million, one hundred fifty-seven thousand, six hundred fifty-seven".