12905172 has 72 divisors (see below), whose sum is σ = 37791936. Its totient is φ = 3636864.

The previous prime is 12905141. The next prime is 12905183. The reversal of 12905172 is 27150921.

12905172 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20608 + ... + 21224.

It is an arithmetic number, because the mean of its divisors is an integer number (524888).

Almost surely, 2^12905172 is an apocalyptic number.

12905172 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 12905172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18895968).

12905172 is an abundant number, since it is smaller than the sum of its proper divisors (24886764).

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

12905172 is a wasteful number, since it uses less digits than its factorization.

12905172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12905172 is about 3592.3769289984. The cubic root of 12905172 is about 234.5603489566.

The spelling of 12905172 in words is "twelve million, nine hundred five thousand, one hundred seventy-two".