11621559 has 16 divisors (see below), whose sum is σ = 16839680. Its totient is φ = 7102080.

The previous prime is 11621543. The next prime is 11621581. The reversal of 11621559 is 95512611.

11621559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11621559 - 2⁴ = 11621543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522 + ... + 5055.

It is an arithmetic number, because the mean of its divisors is an integer number (1052480).

Almost surely, 2^11621559 is an apocalyptic number.

11621559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11621559 is a deficient number, since it is larger than the sum of its proper divisors (5218121).

11621559 is a wasteful number, since it uses less digits than its factorization.

11621559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630.

The product of its digits is 2700, while the sum is 30.

The square root of 11621559 is about 3409.0407741768. The cubic root of 11621559 is about 226.5103913677.

The spelling of 11621559 in words is "eleven million, six hundred twenty-one thousand, five hundred fifty-nine".