10561905 has 24 divisors (see below), whose sum is σ = 18545280. Its totient is φ = 5559840.

The previous prime is 10561883. The next prime is 10561907. The reversal of 10561905 is 50916501.

10561905 is a `hidden beast` number, since 10 + 561 + 90 + 5 = 666.

It is not a de Polignac number, because 10561905 - 2⁶ = 10561841 is a prime.

It is a super-2 number, since 2×10561905² = 223107674458050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10561907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2070 + ... + 5040.

It is an arithmetic number, because the mean of its divisors is an integer number (772720).

Almost surely, 2^10561905 is an apocalyptic number.

10561905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10561905 is a deficient number, since it is larger than the sum of its proper divisors (7983375).

10561905 is a wasteful number, since it uses less digits than its factorization.

10561905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3058 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 10561905 is about 3249.9084602493. The cubic root of 10561905 is about 219.4054539259.

The spelling of 10561905 in words is "ten million, five hundred sixty-one thousand, nine hundred five".