12674781 has 36 divisors (see below), whose sum is σ = 21847644. Its totient is φ = 7056000.

The previous prime is 12674777. The next prime is 12674803. The reversal of 12674781 is 18747621.

It can be written as a sum of positive squares in 2 ways, for example, as 5336100 + 7338681 = 2310^2 + 2709^2 .

It is not a de Polignac number, because 12674781 - 2² = 12674777 is a prime.

It is a super-2 number, since 2×12674781² = 321300146795922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12674731) 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 35 ways as a sum of consecutive naturals, for example, 17731 + ... + 18431.

It is an arithmetic number, because the mean of its divisors is an integer number (606879).

Almost surely, 2^12674781 is an apocalyptic number.

It is an amenable number.

12674781 is a deficient number, since it is larger than the sum of its proper divisors (9172863).

12674781 is a wasteful number, since it uses less digits than its factorization.

12674781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 752 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 12674781 is about 3560.1658669225. The cubic root of 12674781 is about 233.1561210002.

The spelling of 12674781 in words is "twelve million, six hundred seventy-four thousand, seven hundred eighty-one".