12851397 has 12 divisors (see below), whose sum is σ = 19991244. Its totient is φ = 7908480.

The previous prime is 12851389. The next prime is 12851401. The reversal of 12851397 is 79315821.

It can be written as a sum of positive squares in 2 ways, for example, as 7403841 + 5447556 = 2721^2 + 2334^2 .

It is not a de Polignac number, because 12851397 - 2³ = 12851389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12851317) 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, 54804 + ... + 55037.

It is an arithmetic number, because the mean of its divisors is an integer number (1665937).

Almost surely, 2^12851397 is an apocalyptic number.

It is an amenable number.

12851397 is a deficient number, since it is larger than the sum of its proper divisors (7139847).

12851397 is a wasteful number, since it uses less digits than its factorization.

12851397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109860 (or 109857 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12851397 is about 3584.8845169684. The cubic root of 12851397 is about 234.2340962138.

The spelling of 12851397 in words is "twelve million, eight hundred fifty-one thousand, three hundred ninety-seven".