11622561 has 8 divisors (see below), whose sum is σ = 15639360. Its totient is φ = 7677072.

The previous prime is 11622539. The next prime is 11622563. The reversal of 11622561 is 16522611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11622561 - 2⁶ = 11622497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11622563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17445 + ... + 18098.

It is an arithmetic number, because the mean of its divisors is an integer number (1954920).

Almost surely, 2^11622561 is an apocalyptic number.

It is an amenable number.

11622561 is a deficient number, since it is larger than the sum of its proper divisors (4016799).

11622561 is a wasteful number, since it uses less digits than its factorization.

11622561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35655.

The product of its digits is 720, while the sum is 24.

The square root of 11622561 is about 3409.1877331705. The cubic root of 11622561 is about 226.5169010190.

The spelling of 11622561 in words is "eleven million, six hundred twenty-two thousand, five hundred sixty-one".