12891746 has 16 divisors (see below), whose sum is σ = 23400576. Its totient is φ = 5199936.

The previous prime is 12891737. The next prime is 12891751. The reversal of 12891746 is 64719821.

It is a super-2 number, since 2×12891746² = 332394229857032, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 26846 + ... + 27321.

It is an arithmetic number, because the mean of its divisors is an integer number (1462536).

Almost surely, 2^12891746 is an apocalyptic number.

12891746 is a deficient number, since it is larger than the sum of its proper divisors (10508830).

12891746 is a wasteful number, since it uses less digits than its factorization.

12891746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54193.

The product of its digits is 24192, while the sum is 38.

The square root of 12891746 is about 3590.5077635343. The cubic root of 12891746 is about 234.4789784803.

The spelling of 12891746 in words is "twelve million, eight hundred ninety-one thousand, seven hundred forty-six".