12689946 has 24 divisors (see below), whose sum is σ = 28514304. Its totient is φ = 4229820.

The previous prime is 12689923. The next prime is 12689969. The reversal of 12689946 is 64998621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12689923) and next prime (12689969).

It is a super-2 number, since 2×12689946² = 322069458965832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12570 + ... + 13541.

It is an arithmetic number, because the mean of its divisors is an integer number (1188096).

Almost surely, 2^12689946 is an apocalyptic number.

12689946 is an abundant number, since it is smaller than the sum of its proper divisors (15824358).

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

12689946 is an equidigital number, since it uses as much as digits as its factorization.

12689946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26128 (or 26116 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 12689946 is about 3562.2950467360. The cubic root of 12689946 is about 233.2490720696.

The spelling of 12689946 in words is "twelve million, six hundred eighty-nine thousand, nine hundred forty-six".