12861407 has 6 divisors (see below), whose sum is σ = 13927032. Its totient is φ = 11871912.

The previous prime is 12861403. The next prime is 12861419. The reversal of 12861407 is 70416821.

It is not a de Polignac number, because 12861407 - 2² = 12861403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12861407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37883 + ... + 38220.

It is an arithmetic number, because the mean of its divisors is an integer number (2321172).

Almost surely, 2^12861407 is an apocalyptic number.

12861407 is a deficient number, since it is larger than the sum of its proper divisors (1065625).

12861407 is an equidigital number, since it uses as much as digits as its factorization.

12861407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76129 (or 76116 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 12861407 is about 3586.2803850229. The cubic root of 12861407 is about 234.2948956948.

The spelling of 12861407 in words is "twelve million, eight hundred sixty-one thousand, four hundred seven".