12951289 has 4 divisors (see below), whose sum is σ = 13947556. Its totient is φ = 11955024.

The previous prime is 12951287. The next prime is 12951307. The reversal of 12951289 is 98215921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 840889 + 12110400 = 917^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 12951289 - 2¹ = 12951287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12951283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498114 + ... + 498139.

It is an arithmetic number, because the mean of its divisors is an integer number (3486889).

Almost surely, 2^12951289 is an apocalyptic number.

It is an amenable number.

12951289 is a deficient number, since it is larger than the sum of its proper divisors (996267).

12951289 is an equidigital number, since it uses as much as digits as its factorization.

12951289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996266.

The product of its digits is 12960, while the sum is 37.

The square root of 12951289 is about 3598.7899355200. The cubic root of 12951289 is about 234.8394194956.

The spelling of 12951289 in words is "twelve million, nine hundred fifty-one thousand, two hundred eighty-nine".