13221273 has 16 divisors (see below), whose sum is σ = 19071360. Its totient is φ = 8098944.

The previous prime is 13221269. The next prime is 13221287. The reversal of 13221273 is 37212231.

It is not a de Polignac number, because 13221273 - 2² = 13221269 is a prime.

It is a super-3 number, since 3×13221273³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13221233) 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, 9613 + ... + 10901.

It is an arithmetic number, because the mean of its divisors is an integer number (1191960).

Almost surely, 2^13221273 is an apocalyptic number.

13221273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13221273 is a deficient number, since it is larger than the sum of its proper divisors (5850087).

13221273 is a wasteful number, since it uses less digits than its factorization.

13221273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its digits is 504, while the sum is 21.

The square root of 13221273 is about 3636.1068466149. The cubic root of 13221273 is about 236.4600394054.

The spelling of 13221273 in words is "thirteen million, two hundred twenty-one thousand, two hundred seventy-three".