12457906 has 8 divisors (see below), whose sum is σ = 19786140. Its totient is φ = 5862528.

The previous prime is 12457897. The next prime is 12457919. The reversal of 12457906 is 60975421.

It can be written as a sum of positive squares in 2 ways, for example, as 10791225 + 1666681 = 3285^2 + 1291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 366409 = 12457906 / (1 + 2 + 4 + 5 + 7 + 9 + 0 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183171 + ... + 183238.

Almost surely, 2^12457906 is an apocalyptic number.

12457906 is a deficient number, since it is larger than the sum of its proper divisors (7328234).

12457906 is a wasteful number, since it uses less digits than its factorization.

12457906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366428.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 12457906 is about 3529.5758952033. The cubic root of 12457906 is about 231.8186379868.

The spelling of 12457906 in words is "twelve million, four hundred fifty-seven thousand, nine hundred six".