12937405 has 8 divisors (see below), whose sum is σ = 16719192. Its totient is φ = 9553728.

The previous prime is 12937403. The next prime is 12937409. The reversal of 12937405 is 50473921.

It can be written as a sum of positive squares in 4 ways, for example, as 2913849 + 10023556 = 1707^2 + 3166^2 .

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 12937405 - 2¹ = 12937403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12937403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99454 + ... + 99583.

It is an arithmetic number, because the mean of its divisors is an integer number (2089899).

Almost surely, 2^12937405 is an apocalyptic number.

It is an amenable number.

12937405 is a deficient number, since it is larger than the sum of its proper divisors (3781787).

12937405 is a wasteful number, since it uses less digits than its factorization.

12937405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199055.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 12937405 is about 3596.8604365474. The cubic root of 12937405 is about 234.7554722195.

The spelling of 12937405 in words is "twelve million, nine hundred thirty-seven thousand, four hundred five".