557842 has 16 divisors (see below), whose sum is σ = 891072. Its totient is φ = 261360.

The previous prime is 557831. The next prime is 557857. The reversal of 557842 is 248755.

It is a super-2 number, since 2×557842² = 622375393928, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

557842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2992 + ... + 3172.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2⁵⁵⁷⁸⁴² is an apocalyptic number.

557842 is a deficient number, since it is larger than the sum of its proper divisors (333230).

557842 is a wasteful number, since it uses less digits than its factorization.

557842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 11200, while the sum is 31.

The square root of 557842 is about 746.8882111802. Note that the first 3 decimals coincide. The cubic root of 557842 is about 82.3196919199.

The spelling of 557842 in words is "five hundred fifty-seven thousand, eight hundred forty-two".