10056561 has 4 divisors (see below), whose sum is σ = 13408752. Its totient is φ = 6704372.

The previous prime is 10056551. The next prime is 10056569. The reversal of 10056561 is 16565001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16565001 = 3 ⋅5521667.

It is a cyclic number.

It is not a de Polignac number, because 10056561 - 2⁷ = 10056433 is a prime.

It is a super-2 number, since 2×10056561² = 202268838293442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10056569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676091 + ... + 1676096.

It is an arithmetic number, because the mean of its divisors is an integer number (3352188).

Almost surely, 2^10056561 is an apocalyptic number.

It is an amenable number.

10056561 is a deficient number, since it is larger than the sum of its proper divisors (3352191).

10056561 is an equidigital number, since it uses as much as digits as its factorization.

10056561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352190.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 10056561 is about 3171.2081294043. The cubic root of 10056561 is about 215.8488955186.

The spelling of 10056561 in words is "ten million, fifty-six thousand, five hundred sixty-one".