11721536 has 28 divisors (see below), whose sum is σ = 24274272. Its totient is φ = 5605248.

The previous prime is 11721527. The next prime is 11721547. The reversal of 11721536 is 63512711.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510 + ... + 5453.

Almost surely, 2^11721536 is an apocalyptic number.

11721536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11721536 is an abundant number, since it is smaller than the sum of its proper divisors (12552736).

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

11721536 is an equidigital number, since it uses as much as digits as its factorization.

11721536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998 (or 7988 counting only the distinct ones).

The product of its digits is 1260, while the sum is 26.

The square root of 11721536 is about 3423.6728815703. The cubic root of 11721536 is about 227.1580726706.

The spelling of 11721536 in words is "eleven million, seven hundred twenty-one thousand, five hundred thirty-six".