12780572 has 36 divisors (see below), whose sum is σ = 26228664. Its totient is φ = 5433120.

The previous prime is 12780557. The next prime is 12780601. The reversal of 12780572 is 27508721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38447 + ... + 38777.

It is an arithmetic number, because the mean of its divisors is an integer number (728574).

Almost surely, 2^12780572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12780572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13114332).

12780572 is an abundant number, since it is smaller than the sum of its proper divisors (13448092).

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

12780572 is a wasteful number, since it uses less digits than its factorization.

12780572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 12780572 is about 3574.9925874049. The cubic root of 12780572 is about 233.8030095110.

The spelling of 12780572 in words is "twelve million, seven hundred eighty thousand, five hundred seventy-two".