12897574 has 4 divisors (see below), whose sum is σ = 19346364. Its totient is φ = 6448786.

The previous prime is 12897569. The next prime is 12897583. The reversal of 12897574 is 47579821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12897574.

It is a congruent number.

It is an unprimeable number.

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, 3224392 + ... + 3224395.

It is an arithmetic number, because the mean of its divisors is an integer number (4836591).

Almost surely, 2^12897574 is an apocalyptic number.

12897574 is a deficient number, since it is larger than the sum of its proper divisors (6448790).

12897574 is an equidigital number, since it uses as much as digits as its factorization.

12897574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448789.

The product of its digits is 141120, while the sum is 43.

The square root of 12897574 is about 3591.3192562066. The cubic root of 12897574 is about 234.5143069665.

The spelling of 12897574 in words is "twelve million, eight hundred ninety-seven thousand, five hundred seventy-four".