557921 has 8 divisors (see below), whose sum is σ = 686784. Its totient is φ = 441360.

The previous prime is 557903. The next prime is 557927. The reversal of 557921 is 129755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 557921 - 2⁶ = 557857 is a prime.

It is a super-2 number, since 2×557921² = 622551684482, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 557921.

It is not an unprimeable number, because it can be changed into a prime (557927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975 + ... + 3156.

It is an arithmetic number, because the mean of its divisors is an integer number (85848).

2⁵⁵⁷⁹²¹ is an apocalyptic number.

It is an amenable number.

557921 is a deficient number, since it is larger than the sum of its proper divisors (128863).

557921 is a wasteful number, since it uses less digits than its factorization.

557921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151.

The product of its digits is 3150, while the sum is 29.

The square root of 557921 is about 746.9410954018. The cubic root of 557921 is about 82.3235776968.

The spelling of 557921 in words is "five hundred fifty-seven thousand, nine hundred twenty-one".