12520906 has 4 divisors (see below), whose sum is σ = 18781362. Its totient is φ = 6260452.

The previous prime is 12520903. The next prime is 12520927. The reversal of 12520906 is 60902521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 5546025 = 2641^2 + 2355^2 .

It is not an unprimeable number, because it can be changed into a prime (12520903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130225 + ... + 3130228.

Almost surely, 2^12520906 is an apocalyptic number.

12520906 is a deficient number, since it is larger than the sum of its proper divisors (6260456).

12520906 is an equidigital number, since it uses as much as digits as its factorization.

12520906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260455.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12520906 is about 3538.4892256442. The cubic root of 12520906 is about 232.2087523591.

The spelling of 12520906 in words is "twelve million, five hundred twenty thousand, nine hundred six".