12578725 has 18 divisors (see below), whose sum is σ = 16578614. Its totient is φ = 9465600.

The previous prime is 12578717. The next prime is 12578737. The reversal of 12578725 is 52787521.

It can be written as a sum of positive squares in 9 ways, for example, as 4186116 + 8392609 = 2046^2 + 2897^2 .

It is not a de Polignac number, because 12578725 - 2³ = 12578717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6355 + ... + 8095.

Almost surely, 2^12578725 is an apocalyptic number.

It is an amenable number.

12578725 is a deficient number, since it is larger than the sum of its proper divisors (3999889).

12578725 is a wasteful number, since it uses less digits than its factorization.

12578725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1763 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 12578725 is about 3546.6498276543. The cubic root of 12578725 is about 232.5656345317.

The spelling of 12578725 in words is "twelve million, five hundred seventy-eight thousand, seven hundred twenty-five".