12689270 has 24 divisors (see below), whose sum is σ = 25108272. Its totient is φ = 4613840.

The previous prime is 12689267. The next prime is 12689273. The reversal of 12689270 is 7298621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12689267) and next prime (12689273).

It is a super-2 number, since 2×12689270² = 322035146265800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12689270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689273) 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, 4034 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (1046178).

Almost surely, 2^12689270 is an apocalyptic number.

12689270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12689270 is a deficient number, since it is larger than the sum of its proper divisors (12419002).

12689270 is a wasteful number, since it uses less digits than its factorization.

12689270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516 (or 10505 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 12689270 is about 3562.2001628207. The cubic root of 12689270 is about 233.2449302297.

The spelling of 12689270 in words is "twelve million, six hundred eighty-nine thousand, two hundred seventy".