12902720 has 56 divisors (see below), whose sum is σ = 31275528. Its totient is φ = 5068800.

The previous prime is 12902717. The next prime is 12902761. The reversal of 12902720 is 2720921.

It can be written as a sum of positive squares in 4 ways, for example, as 399424 + 12503296 = 632^2 + 3536^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19190 + ... + 19850.

Almost surely, 2^12902720 is an apocalyptic number.

12902720 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 12902720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15637764).

12902720 is an abundant number, since it is smaller than the sum of its proper divisors (18372808).

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

12902720 is an equidigital number, since it uses as much as digits as its factorization.

12902720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 12902720 is about 3592.0356345671. The cubic root of 12902720 is about 234.5454924220.

The spelling of 12902720 in words is "twelve million, nine hundred two thousand, seven hundred twenty".