13440621 has 8 divisors (see below), whose sum is σ = 17941600. Its totient is φ = 8950032.

The previous prime is 13440617. The next prime is 13440653. The reversal of 13440621 is 12604431.

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

It is not a de Polignac number, because 13440621 - 2² = 13440617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (2242700).

Almost surely, 2^13440621 is an apocalyptic number.

It is an amenable number.

13440621 is a deficient number, since it is larger than the sum of its proper divisors (4500979).

13440621 is a wasteful number, since it uses less digits than its factorization.

13440621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 13440621 is about 3666.1452508050. The cubic root of 13440621 is about 237.7605399346.

It can be divided in two parts, 134 and 40621, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 13440621 in words is "thirteen million, four hundred forty thousand, six hundred twenty-one".