12421392 has 20 divisors (see below), whose sum is σ = 32088720. Its totient is φ = 4140448.

The previous prime is 12421391. The next prime is 12421393. The reversal of 12421392 is 29312421.

It is an interprime number because it is at equal distance from previous prime (12421391) and next prime (12421393).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (12421391) 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, 129342 + ... + 129437.

It is an arithmetic number, because the mean of its divisors is an integer number (1604436).

Almost surely, 2^12421392 is an apocalyptic number.

12421392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12421392 is an abundant number, since it is smaller than the sum of its proper divisors (19667328).

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

12421392 is a wasteful number, since it uses less digits than its factorization.

12421392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258790 (or 258784 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 12421392 is about 3524.3995233231. The cubic root of 12421392 is about 231.5919303001.

The spelling of 12421392 in words is "twelve million, four hundred twenty-one thousand, three hundred ninety-two".