12691075 has 12 divisors (see below), whose sum is σ = 15847200. Its totient is φ = 10081760.

The previous prime is 12691057. The next prime is 12691079. The reversal of 12691075 is 57019621.

It is not a de Polignac number, because 12691075 - 2⁵ = 12691043 is a prime.

It is a super-2 number, since 2×12691075² = 322126769311250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12691079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2022 + ... + 5428.

It is an arithmetic number, because the mean of its divisors is an integer number (1320600).

Almost surely, 2^12691075 is an apocalyptic number.

12691075 is a deficient number, since it is larger than the sum of its proper divisors (3156125).

12691075 is a wasteful number, since it uses less digits than its factorization.

12691075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3561 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 12691075 is about 3562.4535084686. The cubic root of 12691075 is about 233.2559891044.

The spelling of 12691075 in words is "twelve million, six hundred ninety-one thousand, seventy-five".