556901 has 4 divisors (see below), whose sum is σ = 566400. Its totient is φ = 547404.

The previous prime is 556891. The next prime is 556931. The reversal of 556901 is 109655.

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 556901 - 2¹⁴ = 540517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556931) 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, 4661 + ... + 4778.

It is an arithmetic number, because the mean of its divisors is an integer number (141600).

2⁵⁵⁶⁹⁰¹ is an apocalyptic number.

It is an amenable number.

556901 is a deficient number, since it is larger than the sum of its proper divisors (9499).

556901 is an equidigital number, since it uses as much as digits as its factorization.

556901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9498.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 556901 is about 746.2579982821. The cubic root of 556901 is about 82.2733786703.

The spelling of 556901 in words is "five hundred fifty-six thousand, nine hundred one".