13449321 has 28 divisors (see below), whose sum is σ = 21247920. Its totient is φ = 8485560.

The previous prime is 13449311. The next prime is 13449323. The reversal of 13449321 is 12394431.

13449321 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 not a de Polignac number, because 13449321 - 2¹⁰ = 13448297 is a prime.

It is a super-2 number, since 2×13449321² = 361768470722082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13449323) 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, 13366 + ... + 14336.

Almost surely, 2^13449321 is an apocalyptic number.

It is an amenable number.

13449321 is a deficient number, since it is larger than the sum of its proper divisors (7798599).

13449321 is an frugal number, since it uses more digits than its factorization.

13449321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 993 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13449321 is about 3667.3315912254. The cubic root of 13449321 is about 237.8118289970.

It can be divided in two parts, 134 and 49321, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 13449321 in words is "thirteen million, four hundred forty-nine thousand, three hundred twenty-one".