556570121 has 4 divisors (see below), whose sum is σ = 570145044. Its totient is φ = 542995200.

The previous prime is 556570111. The next prime is 556570141. The reversal of 556570121 is 121075655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 331240000 + 225330121 = 18200^2 + 15011^2 .

It is a cyclic number.

It is not a de Polignac number, because 556570121 - 2⁶ = 556570057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556570111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787400 + ... + 6787481.

It is an arithmetic number, because the mean of its divisors is an integer number (142536261).

Almost surely, 2^556570121 is an apocalyptic number.

It is an amenable number.

556570121 is a deficient number, since it is larger than the sum of its proper divisors (13574923).

556570121 is a wasteful number, since it uses less digits than its factorization.

556570121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13574922.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 556570121 is about 23591.7384056368. The cubic root of 556570121 is about 822.5708138326.

The spelling of 556570121 in words is "five hundred fifty-six million, five hundred seventy thousand, one hundred twenty-one".