11611572 has 48 divisors (see below), whose sum is σ = 31221120. Its totient is φ = 3290112.

The previous prime is 11611559. The next prime is 11611597. The reversal of 11611572 is 27511611.

11611572 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11611572² = 269657208622368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11004 + ... + 12012.

It is an arithmetic number, because the mean of its divisors is an integer number (650440).

Almost surely, 2^11611572 is an apocalyptic number.

11611572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11611572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15610560).

11611572 is an abundant number, since it is smaller than the sum of its proper divisors (19609548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11611572 is a wasteful number, since it uses less digits than its factorization.

11611572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1158 counting only the distinct ones).

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

The square root of 11611572 is about 3407.5756778097. The cubic root of 11611572 is about 226.4454887849.

The spelling of 11611572 in words is "eleven million, six hundred eleven thousand, five hundred seventy-two".