11812520 has 16 divisors (see below), whose sum is σ = 26578260. Its totient is φ = 4724992.

The previous prime is 11812517. The next prime is 11812529. The reversal of 11812520 is 2521811.

It is a happy number.

11812520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 20164 = 3434^2 + 142^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11812492 and 11812501.

It is not an unprimeable number, because it can be changed into a prime (11812529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147617 + ... + 147696.

Almost surely, 2^11812520 is an apocalyptic number.

11812520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11812520 is an abundant number, since it is smaller than the sum of its proper divisors (14765740).

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

11812520 is a wasteful number, since it uses less digits than its factorization.

11812520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295324 (or 295320 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11812520 is about 3436.9346807875. The cubic root of 11812520 is about 227.7443014235.

The spelling of 11812520 in words is "eleven million, eight hundred twelve thousand, five hundred twenty".