13072761 has 12 divisors (see below), whose sum is σ = 20335588. Its totient is φ = 8044704.

The previous prime is 13072757. The next prime is 13072771. The reversal of 13072761 is 16727031.

It can be written as a sum of positive squares in 2 ways, for example, as 5035536 + 8037225 = 2244^2 + 2835^2 .

It is not a de Polignac number, because 13072761 - 2² = 13072757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13072771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55750 + ... + 55983.

Almost surely, 2^13072761 is an apocalyptic number.

It is an amenable number.

13072761 is a deficient number, since it is larger than the sum of its proper divisors (7262827).

13072761 is a wasteful number, since it uses less digits than its factorization.

13072761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111752 (or 111749 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 13072761 is about 3615.6273314599. The cubic root of 13072761 is about 235.5713335505.

Adding to 13072761 its reverse (16727031), we get a palindrome (29799792).

The spelling of 13072761 in words is "thirteen million, seventy-two thousand, seven hundred sixty-one".