12761331 has 16 divisors (see below), whose sum is σ = 19539840. Its totient is φ = 7326720.

The previous prime is 12761321. The next prime is 12761347. The reversal of 12761331 is 13316721.

It is not a de Polignac number, because 12761331 - 2⁶ = 12761267 is a prime.

It is a super-2 number, since 2×12761331² = 325703137783122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12761311) 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 15 ways as a sum of consecutive naturals, for example, 9550 + ... + 10803.

It is an arithmetic number, because the mean of its divisors is an integer number (1221240).

Almost surely, 2^12761331 is an apocalyptic number.

12761331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12761331 is a deficient number, since it is larger than the sum of its proper divisors (6778509).

12761331 is a wasteful number, since it uses less digits than its factorization.

12761331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20386.

The product of its digits is 756, while the sum is 24.

The square root of 12761331 is about 3572.3005192733. The cubic root of 12761331 is about 233.6856213605.

The spelling of 12761331 in words is "twelve million, seven hundred sixty-one thousand, three hundred thirty-one".