12689954 has 8 divisors (see below), whose sum is σ = 19053468. Its totient is φ = 6338800.

The previous prime is 12689923. The next prime is 12689969. The reversal of 12689954 is 45998621.

It can be written as a sum of positive squares in 2 ways, for example, as 9891025 + 2798929 = 3145^2 + 1673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12689954² = 322069865044232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164 + ... + 5040.

Almost surely, 2^12689954 is an apocalyptic number.

12689954 is a deficient number, since it is larger than the sum of its proper divisors (6363514).

12689954 is a wasteful number, since it uses less digits than its factorization.

12689954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180.

The product of its digits is 155520, while the sum is 44.

The square root of 12689954 is about 3562.2961696075. The cubic root of 12689954 is about 233.2491210846.

The spelling of 12689954 in words is "twelve million, six hundred eighty-nine thousand, nine hundred fifty-four".