13621271 has 16 divisors (see below), whose sum is σ = 15120000. Its totient is φ = 12218976.

The previous prime is 13621261. The next prime is 13621303. The reversal of 13621271 is 17212631.

It is not a de Polignac number, because 13621271 - 2¹⁴ = 13604887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32300 + ... + 32718.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^13621271 is an apocalyptic number.

13621271 is a deficient number, since it is larger than the sum of its proper divisors (1498729).

13621271 is a wasteful number, since it uses less digits than its factorization.

13621271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its digits is 504, while the sum is 23.

The square root of 13621271 is about 3690.7006109952. The cubic root of 13621271 is about 238.8210175875.

The spelling of 13621271 in words is "thirteen million, six hundred twenty-one thousand, two hundred seventy-one".