557901 has 8 divisors (see below), whose sum is σ = 826560. Its totient is φ = 371916.

The previous prime is 557899. The next prime is 557903. The reversal of 557901 is 109755.

It is an interprime number because it is at equal distance from previous prime (557899) and next prime (557903).

It is not a de Polignac number, because 557901 - 2¹ = 557899 is a prime.

It is a super-2 number, since 2×557901² = 622507051602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 20663 = 557901 / (5 + 5 + 7 + 9 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10305 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2⁵⁵⁷⁹⁰¹ is an apocalyptic number.

It is an amenable number.

557901 is a deficient number, since it is larger than the sum of its proper divisors (268659).

557901 is a wasteful number, since it uses less digits than its factorization.

557901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20672 (or 20666 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 557901 is about 746.9277073452. The cubic root of 557901 is about 82.3225939905.

The spelling of 557901 in words is "five hundred fifty-seven thousand, nine hundred one".