12917745 has 32 divisors (see below), whose sum is σ = 23212800. Its totient is φ = 6815232.

The previous prime is 12917741. The next prime is 12917761. The reversal of 12917745 is 54771921.

It is a happy number.

It is not a de Polignac number, because 12917745 - 2² = 12917741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12917741) 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 31 ways as a sum of consecutive naturals, for example, 13441 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (725400).

Almost surely, 2^12917745 is an apocalyptic number.

12917745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12917745 is a deficient number, since it is larger than the sum of its proper divisors (10295055).

12917745 is a wasteful number, since it uses less digits than its factorization.

12917745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1040 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 12917745 is about 3594.1264585432. The cubic root of 12917745 is about 234.6364985305.

The spelling of 12917745 in words is "twelve million, nine hundred seventeen thousand, seven hundred forty-five".