11373561 has 32 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 7015680.

The previous prime is 11373553. The next prime is 11373601. The reversal of 11373561 is 16537311.

It is not a de Polignac number, because 11373561 - 2³ = 11373553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11373521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32415 + ... + 32763.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^11373561 is an apocalyptic number.

It is an amenable number.

11373561 is a deficient number, since it is larger than the sum of its proper divisors (6770439).

11373561 is a wasteful number, since it uses less digits than its factorization.

11373561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 11373561 is about 3372.4710525073. The cubic root of 11373561 is about 224.8875882921.

The spelling of 11373561 in words is "eleven million, three hundred seventy-three thousand, five hundred sixty-one".