12776407 has 12 divisors (see below), whose sum is σ = 14977200. Its totient is φ = 10894464.

The previous prime is 12776383. The next prime is 12776411. The reversal of 12776407 is 70467721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 12776407 - 2¹⁵ = 12743639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776437) 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, 66103 + ... + 66295.

It is an arithmetic number, because the mean of its divisors is an integer number (1248100).

Almost surely, 2^12776407 is an apocalyptic number.

12776407 is a deficient number, since it is larger than the sum of its proper divisors (2200793).

12776407 is an frugal number, since it uses more digits than its factorization.

12776407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 12776407 is about 3574.4100212483. The cubic root of 12776407 is about 233.7776091003. Note that the first 3 decimals are identical.

The spelling of 12776407 in words is "twelve million, seven hundred seventy-six thousand, four hundred seven".