12920472 has 80 divisors (see below), whose sum is σ = 36706560. Its totient is φ = 4245696.

The previous prime is 12920461. The next prime is 12920483. The reversal of 12920472 is 27402921.

It is an interprime number because it is at equal distance from previous prime (12920461) and next prime (12920483).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 82218 + ... + 82374.

It is an arithmetic number, because the mean of its divisors is an integer number (458832).

Almost surely, 2^12920472 is an apocalyptic number.

12920472 is a gapful number since it is divisible by the number (12) 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 12920472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18353280).

12920472 is an abundant number, since it is smaller than the sum of its proper divisors (23786088).

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

12920472 is a wasteful number, since it uses less digits than its factorization.

12920472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12920472 is about 3594.5058074790. The cubic root of 12920472 is about 234.6530083448.

The spelling of 12920472 in words is "twelve million, nine hundred twenty thousand, four hundred seventy-two".