12689154 has 48 divisors (see below), whose sum is σ = 28708992. Its totient is φ = 4047264.

The previous prime is 12689147. The next prime is 12689167. The reversal of 12689154 is 45198621.

It is a super-2 number, since 2×12689154² = 322029258471432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44697 + ... + 44979.

It is an arithmetic number, because the mean of its divisors is an integer number (598104).

Almost surely, 2^12689154 is an apocalyptic number.

12689154 is an abundant number, since it is smaller than the sum of its proper divisors (16019838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12689154 is a wasteful number, since it uses less digits than its factorization.

12689154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 388 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12689154 is about 3562.1838807114. The cubic root of 12689154 is about 233.2442194850.

The spelling of 12689154 in words is "twelve million, six hundred eighty-nine thousand, one hundred fifty-four".