12909401 has 4 divisors (see below), whose sum is σ = 12922932. Its totient is φ = 12895872.

The previous prime is 12909397. The next prime is 12909427. The reversal of 12909401 is 10490921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10272025 + 2637376 = 3205^2 + 1624^2 .

It is a cyclic number.

It is not a de Polignac number, because 12909401 - 2² = 12909397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12909431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5216 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (3230733).

Almost surely, 2^12909401 is an apocalyptic number.

It is an amenable number.

12909401 is a deficient number, since it is larger than the sum of its proper divisors (13531).

12909401 is a wasteful number, since it uses less digits than its factorization.

12909401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12909401 is about 3592.9654882840. The cubic root of 12909401 is about 234.5859678166.

The spelling of 12909401 in words is "twelve million, nine hundred nine thousand, four hundred one".