12999405 has 16 divisors (see below), whose sum is σ = 21141504. Its totient is φ = 6818880.

The previous prime is 12999397. The next prime is 12999409. The reversal of 12999405 is 50499921.

It is not a de Polignac number, because 12999405 - 2³ = 12999397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12999409) 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, 6189 + ... + 8018.

It is an arithmetic number, because the mean of its divisors is an integer number (1321344).

Almost surely, 2^12999405 is an apocalyptic number.

12999405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12999405 is a deficient number, since it is larger than the sum of its proper divisors (8142099).

12999405 is a wasteful number, since it uses less digits than its factorization.

12999405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14276.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 12999405 is about 3605.4687628657. The cubic root of 12999405 is about 235.1298814247.

The spelling of 12999405 in words is "twelve million, nine hundred ninety-nine thousand, four hundred five".