12960991 has 4 divisors (see below), whose sum is σ = 13205592. Its totient is φ = 12716392.

The previous prime is 12960973. The next prime is 12961001. The reversal of 12960991 is 19906921.

12960991 = T₂₉₃₈ + T₂₉₃₉ + T₂₉₄₀.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19906921 = 3049 ⋅6529.

It is a cyclic number.

It is not a de Polignac number, because 12960991 - 2¹³ = 12952799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12960991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12960901) 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, 122221 + ... + 122326.

It is an arithmetic number, because the mean of its divisors is an integer number (3301398).

Almost surely, 2^12960991 is an apocalyptic number.

12960991 is the 2940-th centered triangular number.

12960991 is a deficient number, since it is larger than the sum of its proper divisors (244601).

12960991 is an equidigital number, since it uses as much as digits as its factorization.

12960991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244600.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 12960991 is about 3600.1376362578. The cubic root of 12960991 is about 234.8980454068.

The spelling of 12960991 in words is "twelve million, nine hundred sixty thousand, nine hundred ninety-one".