12240920 has 16 divisors (see below), whose sum is σ = 27542160. Its totient is φ = 4896352.

The previous prime is 12240913. The next prime is 12240937. The reversal of 12240920 is 2904221.

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 = 12240892 and 12240901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152972 + ... + 153051.

It is an arithmetic number, because the mean of its divisors is an integer number (1721385).

Almost surely, 2^12240920 is an apocalyptic number.

12240920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12240920 is an abundant number, since it is smaller than the sum of its proper divisors (15301240).

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

12240920 is a wasteful number, since it uses less digits than its factorization.

12240920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306034 (or 306030 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12240920 is about 3498.7026166852. The cubic root of 12240920 is about 230.4648443866.

The spelling of 12240920 in words is "twelve million, two hundred forty thousand, nine hundred twenty".