2557457 has 24 divisors (see below), whose sum is σ = 3255840. Its totient is φ = 1995840.

The previous prime is 2557453. The next prime is 2557501. The reversal of 2557457 is 7547552.

It is a happy number.

It is not a de Polignac number, because 2557457 - 2² = 2557453 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38138 + ... + 38204.

It is an arithmetic number, because the mean of its divisors is an integer number (135660).

2^2557457 is an apocalyptic number.

It is an amenable number.

2557457 is a deficient number, since it is larger than the sum of its proper divisors (698383).

2557457 is a wasteful number, since it uses less digits than its factorization.

2557457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 134 counting only the distinct ones).

The product of its digits is 49000, while the sum is 35.

The square root of 2557457 is about 1599.2051150493. The cubic root of 2557457 is about 136.7527641769.

The spelling of 2557457 in words is "two million, five hundred fifty-seven thousand, four hundred fifty-seven".