12693945 has 32 divisors (see below), whose sum is σ = 22394880. Its totient is φ = 6088640.

The previous prime is 12693943. The next prime is 12693959. The reversal of 12693945 is 54939621.

12693945 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12693945 - 2¹ = 12693943 is a prime.

It is a super-2 number, since 2×12693945² = 322272479326050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12693943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17296 + ... + 18014.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^12693945 is an apocalyptic number.

12693945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12693945 is a deficient number, since it is larger than the sum of its proper divisors (9700935).

12693945 is a wasteful number, since it uses less digits than its factorization.

12693945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its digits is 58320, while the sum is 39.

The square root of 12693945 is about 3562.8562979722. The cubic root of 12693945 is about 233.2735708625.

The spelling of 12693945 in words is "twelve million, six hundred ninety-three thousand, nine hundred forty-five".