12999261 has 32 divisors (see below), whose sum is σ = 19869696. Its totient is φ = 7488000.

The previous prime is 12999253. The next prime is 12999263. The reversal of 12999261 is 16299921.

12999261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12999261 - 2³ = 12999253 is a prime.

It is a super-2 number, since 2×12999261² = 337961573092242, 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 (12999263) 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 31 ways as a sum of consecutive naturals, for example, 99166 + ... + 99296.

It is an arithmetic number, because the mean of its divisors is an integer number (620928).

Almost surely, 2^12999261 is an apocalyptic number.

12999261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12999261 is a deficient number, since it is larger than the sum of its proper divisors (6870435).

12999261 is a wasteful number, since it uses less digits than its factorization.

12999261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its digits is 17496, while the sum is 39.

The square root of 12999261 is about 3605.4487931463. The cubic root of 12999261 is about 235.1290132099.

The spelling of 12999261 in words is "twelve million, nine hundred ninety-nine thousand, two hundred sixty-one".