12949857 has 12 divisors (see below), whose sum is σ = 18779904. Its totient is φ = 8598840.

The previous prime is 12949841. The next prime is 12949877. The reversal of 12949857 is 75894921.

It is not a de Polignac number, because 12949857 - 2⁴ = 12949841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12949877) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 369 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (1564992).

Almost surely, 2^12949857 is an apocalyptic number.

It is an amenable number.

12949857 is a deficient number, since it is larger than the sum of its proper divisors (5830047).

12949857 is a wasteful number, since it uses less digits than its factorization.

12949857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740 (or 5737 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 12949857 is about 3598.5909742565. The cubic root of 12949857 is about 234.8307639236.

The spelling of 12949857 in words is "twelve million, nine hundred forty-nine thousand, eight hundred fifty-seven".