12957405 has 16 divisors (see below), whose sum is σ = 21215040. Its totient is φ = 6749568.

The previous prime is 12957401. The next prime is 12957419. The reversal of 12957405 is 50475921.

It is not a de Polignac number, because 12957405 - 2² = 12957401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12957401) 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, 9400 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (1325940).

Almost surely, 2^12957405 is an apocalyptic number.

12957405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12957405 is a deficient number, since it is larger than the sum of its proper divisors (8257635).

12957405 is a wasteful number, since it uses less digits than its factorization.

12957405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 12957405 is about 3599.6395652898. The cubic root of 12957405 is about 234.8763798287.

The spelling of 12957405 in words is "twelve million, nine hundred fifty-seven thousand, four hundred five".