12731007 has 16 divisors (see below), whose sum is σ = 18000000. Its totient is φ = 7981344.

The previous prime is 12731003. The next prime is 12731023. The reversal of 12731007 is 70013721.

12731007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12731007 - 2² = 12731003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7744 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (1125000).

Almost surely, 2^12731007 is an apocalyptic number.

12731007 is a deficient number, since it is larger than the sum of its proper divisors (5268993).

12731007 is a wasteful number, since it uses less digits than its factorization.

12731007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 12731007 is about 3568.0536711210. The cubic root of 12731007 is about 233.5003767569.

Adding to 12731007 its reverse (70013721), we get a palindrome (82744728).

The spelling of 12731007 in words is "twelve million, seven hundred thirty-one thousand, seven".