11572161 has 8 divisors (see below), whose sum is σ = 15463680. Its totient is φ = 7697712.

The previous prime is 11572133. The next prime is 11572163. The reversal of 11572161 is 16127511.

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

It is not a de Polignac number, because 11572161 - 2⁵ = 11572129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11572163) 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, 2590 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (1932960).

Almost surely, 2^11572161 is an apocalyptic number.

It is an amenable number.

11572161 is a deficient number, since it is larger than the sum of its proper divisors (3891519).

11572161 is an equidigital number, since it uses as much as digits as its factorization.

11572161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535.

The product of its digits is 420, while the sum is 24.

The square root of 11572161 is about 3401.7879122603. The cubic root of 11572161 is about 226.1890044461.

Adding to 11572161 its reverse (16127511), we get a palindrome (27699672).

The spelling of 11572161 in words is "eleven million, five hundred seventy-two thousand, one hundred sixty-one".