11279521 has 16 divisors (see below), whose sum is σ = 13406400. Its totient is φ = 9374400.

The previous prime is 11279507. The next prime is 11279537. The reversal of 11279521 is 12597211.

It is a cyclic number.

It is not a de Polignac number, because 11279521 - 2⁷ = 11279393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11279521.

It is not an unprimeable number, because it can be changed into a prime (11279921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5131 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^11279521 is an apocalyptic number.

11279521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11279521 is a deficient number, since it is larger than the sum of its proper divisors (2126879).

11279521 is a wasteful number, since it uses less digits than its factorization.

11279521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920.

The product of its digits is 1260, while the sum is 28.

The square root of 11279521 is about 3358.4998139050. The cubic root of 11279521 is about 224.2660595493.

It can be divided in two parts, 1127 and 9521, that added together give a cube (10648 = 22³).

The spelling of 11279521 in words is "eleven million, two hundred seventy-nine thousand, five hundred twenty-one".