12916405 has 8 divisors (see below), whose sum is σ = 15523200. Its totient is φ = 10317456.

The previous prime is 12916373. The next prime is 12916417. The reversal of 12916405 is 50461921.

12916405 = 1132² + 1133² + ... + 1141².

12916405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12916405 - 2⁵ = 12916373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2656 + ... + 5734.

It is an arithmetic number, because the mean of its divisors is an integer number (1940400).

Almost surely, 2^12916405 is an apocalyptic number.

It is an amenable number.

12916405 is a deficient number, since it is larger than the sum of its proper divisors (2606795).

12916405 is an equidigital number, since it uses as much as digits as its factorization.

12916405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12916405 is about 3593.9400384536. The cubic root of 12916405 is about 234.6283850458.

The spelling of 12916405 in words is "twelve million, nine hundred sixteen thousand, four hundred five".