11561272 has 32 divisors (see below), whose sum is σ = 23817600. Its totient is φ = 5236704.

The previous prime is 11561267. The next prime is 11561287. The reversal of 11561272 is 27216511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (744300).

Almost surely, 2^11561272 is an apocalyptic number.

It is an amenable number.

11561272 is an abundant number, since it is smaller than the sum of its proper divisors (12256328).

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

11561272 is a wasteful number, since it uses less digits than its factorization.

11561272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3351 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 11561272 is about 3400.1870536781. The cubic root of 11561272 is about 226.1180368600.

Adding to 11561272 its reverse (27216511), we get a palindrome (38777783).

The spelling of 11561272 in words is "eleven million, five hundred sixty-one thousand, two hundred seventy-two".