557457 has 4 divisors (see below), whose sum is σ = 743280. Its totient is φ = 371636.

The previous prime is 557449. The next prime is 557461. The reversal of 557457 is 754755.

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 a cyclic number.

It is not a de Polignac number, because 557457 - 2³ = 557449 is a prime.

It is a D-number.

557457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (557057) 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, 92907 + ... + 92912.

It is an arithmetic number, because the mean of its divisors is an integer number (185820).

2⁵⁵⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

557457 is a deficient number, since it is larger than the sum of its proper divisors (185823).

557457 is a wasteful number, since it uses less digits than its factorization.

557457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185822.

The product of its digits is 24500, while the sum is 33.

The square root of 557457 is about 746.6304306683. The cubic root of 557457 is about 82.3007496535.

The spelling of 557457 in words is "five hundred fifty-seven thousand, four hundred fifty-seven".