13121271 has 28 divisors (see below), whose sum is σ = 20198640. Its totient is φ = 8514720.

The previous prime is 13121257. The next prime is 13121279. The reversal of 13121271 is 17212131.

It is a happy number.

It is not a de Polignac number, because 13121271 - 2⁹ = 13120759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121279) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 29670 + ... + 30108.

It is an arithmetic number, because the mean of its divisors is an integer number (721380).

Almost surely, 2^13121271 is an apocalyptic number.

13121271 is a deficient number, since it is larger than the sum of its proper divisors (7077369).

13121271 is an frugal number, since it uses more digits than its factorization.

13121271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 483 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 13121271 is about 3622.3294990931. The cubic root of 13121271 is about 235.8623574956.

The spelling of 13121271 in words is "thirteen million, one hundred twenty-one thousand, two hundred seventy-one".