11556420 has 48 divisors (see below), whose sum is σ = 32695488. Its totient is φ = 3049600.

The previous prime is 11556409. The next prime is 11556431. The reversal of 11556420 is 2465511.

It is an interprime number because it is at equal distance from previous prime (11556409) and next prime (11556431).

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, 5107 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (681156).

Almost surely, 2^11556420 is an apocalyptic number.

11556420 is a gapful number since it is divisible by the number (10) 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 11556420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16347744).

11556420 is an abundant number, since it is smaller than the sum of its proper divisors (21139068).

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

11556420 is a wasteful number, since it uses less digits than its factorization.

11556420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 11556420 is about 3399.4734886450. The cubic root of 11556420 is about 226.0864002538.

Subtracting from 11556420 its reverse (2465511), we obtain a palindrome (9090909).

The spelling of 11556420 in words is "eleven million, five hundred fifty-six thousand, four hundred twenty".