12689654 has 4 divisors (see below), whose sum is σ = 19034484. Its totient is φ = 6344826.

The previous prime is 12689653. The next prime is 12689657. The reversal of 12689654 is 45698621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12689654² = 322054637279432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3172412 + ... + 3172415.

It is an arithmetic number, because the mean of its divisors is an integer number (4758621).

Almost surely, 2^12689654 is an apocalyptic number.

12689654 is a deficient number, since it is larger than the sum of its proper divisors (6344830).

12689654 is an equidigital number, since it uses as much as digits as its factorization.

12689654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344829.

The product of its digits is 103680, while the sum is 41.

The square root of 12689654 is about 3562.2540616862. The cubic root of 12689654 is about 233.2472830089.

The spelling of 12689654 in words is "twelve million, six hundred eighty-nine thousand, six hundred fifty-four".