12940407 has 12 divisors (see below), whose sum is σ = 18808504. Its totient is φ = 8573040.

The previous prime is 12940393. The next prime is 12940429. The reversal of 12940407 is 70404921.

It is a happy number.

It is not a de Polignac number, because 12940407 - 2¹⁰ = 12939383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12940507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2944 + ... + 5877.

Almost surely, 2^12940407 is an apocalyptic number.

12940407 is a deficient number, since it is larger than the sum of its proper divisors (5868097).

12940407 is a wasteful number, since it uses less digits than its factorization.

12940407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8990 (or 8987 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12940407 is about 3597.2777207216. The cubic root of 12940407 is about 234.7736283960.

The spelling of 12940407 in words is "twelve million, nine hundred forty thousand, four hundred seven".