12901281 has 4 divisors (see below), whose sum is σ = 17201712. Its totient is φ = 8600852.

The previous prime is 12901279. The next prime is 12901297. The reversal of 12901281 is 18210921.

12901281 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18210921 = 3 ⋅6070307.

It is a cyclic number.

It is not a de Polignac number, because 12901281 - 2¹ = 12901279 is a prime.

It is a super-2 number, since 2×12901281² = 332886102881922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12901081) 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, 2150211 + ... + 2150216.

It is an arithmetic number, because the mean of its divisors is an integer number (4300428).

Almost surely, 2^12901281 is an apocalyptic number.

It is an amenable number.

12901281 is a deficient number, since it is larger than the sum of its proper divisors (4300431).

12901281 is an equidigital number, since it uses as much as digits as its factorization.

12901281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300430.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 12901281 is about 3591.8353247330. The cubic root of 12901281 is about 234.5367727228.

The spelling of 12901281 in words is "twelve million, nine hundred one thousand, two hundred eighty-one".