12867831 has 6 divisors (see below), whose sum is σ = 18586880. Its totient is φ = 8578548.

The previous prime is 12867797. The next prime is 12867839. The reversal of 12867831 is 13876821.

It is not a de Polignac number, because 12867831 - 2⁹ = 12867319 is a prime.

It is a super-2 number, since 2×12867831² = 331162149289122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12867839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714871 + ... + 714888.

Almost surely, 2^12867831 is an apocalyptic number.

12867831 is a deficient number, since it is larger than the sum of its proper divisors (5719049).

12867831 is a wasteful number, since it uses less digits than its factorization.

12867831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429765 (or 1429762 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12867831 is about 3587.1759087059. The cubic root of 12867831 is about 234.3338976456. Note that the first 3 decimals are identical.

The spelling of 12867831 in words is "twelve million, eight hundred sixty-seven thousand, eight hundred thirty-one".