13271621 has 8 divisors (see below), whose sum is σ = 15107904. Its totient is φ = 11540320.

The previous prime is 13271603. The next prime is 13271651. The reversal of 13271621 is 12617231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13271621 is a prime.

It is a super-2 number, since 2×13271621² = 352271847935282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13271651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25976 + ... + 26481.

It is an arithmetic number, because the mean of its divisors is an integer number (1888488).

Almost surely, 2^13271621 is an apocalyptic number.

13271621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13271621 is a deficient number, since it is larger than the sum of its proper divisors (1836283).

13271621 is a wasteful number, since it uses less digits than its factorization.

13271621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52491.

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

The square root of 13271621 is about 3643.0236068409. The cubic root of 13271621 is about 236.7598141133.

Adding to 13271621 its reverse (12617231), we get a palindrome (25888852).

The spelling of 13271621 in words is "thirteen million, two hundred seventy-one thousand, six hundred twenty-one".