12749081 has 4 divisors (see below), whose sum is σ = 12833664. Its totient is φ = 12664500.

The previous prime is 12749063. The next prime is 12749101. The reversal of 12749081 is 18094721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12749081 - 2⁶ = 12749017 is a prime.

It is a super-2 number, since 2×12749081² = 325078132689122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12749021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42065 + ... + 42366.

It is an arithmetic number, because the mean of its divisors is an integer number (3208416).

Almost surely, 2^12749081 is an apocalyptic number.

It is an amenable number.

12749081 is a deficient number, since it is larger than the sum of its proper divisors (84583).

12749081 is an equidigital number, since it uses as much as digits as its factorization.

12749081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84582.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12749081 is about 3570.5855262128. The cubic root of 12749081 is about 233.6108233808.

The spelling of 12749081 in words is "twelve million, seven hundred forty-nine thousand, eighty-one".