10591561 has 12 divisors (see below), whose sum is σ = 11440048. Its totient is φ = 9801792.

The previous prime is 10591541. The next prime is 10591597. The reversal of 10591561 is 16519501.

It is not a de Polignac number, because 10591561 - 2⁷ = 10591433 is a prime.

It is a super-2 number, since 2×10591561² = 224362328833442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10591501) 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 11 ways as a sum of consecutive naturals, for example, 19090 + ... + 19636.

Almost surely, 2^10591561 is an apocalyptic number.

It is an amenable number.

10591561 is a deficient number, since it is larger than the sum of its proper divisors (848487).

10591561 is an equidigital number, since it uses as much as digits as its factorization.

10591561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 10591561 is about 3254.4678520459. The cubic root of 10591561 is about 219.6106128671.

The spelling of 10591561 in words is "ten million, five hundred ninety-one thousand, five hundred sixty-one".