13575621 has 8 divisors (see below), whose sum is σ = 18486144. Its totient is φ = 8857760.

The previous prime is 13575599. The next prime is 13575629. The reversal of 13575621 is 12657531.

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

It is a cyclic number.

It is not a de Polignac number, because 13575621 - 2¹⁷ = 13444549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13575629) 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, 48000 + ... + 48281.

It is an arithmetic number, because the mean of its divisors is an integer number (2310768).

Almost surely, 2^13575621 is an apocalyptic number.

It is an amenable number.

13575621 is a deficient number, since it is larger than the sum of its proper divisors (4910523).

13575621 is an equidigital number, since it uses as much as digits as its factorization.

13575621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96331.

The product of its digits is 6300, while the sum is 30.

The square root of 13575621 is about 3684.5109580513. The cubic root of 13575621 is about 238.5539259855.

It can be divided in two parts, 13575 and 621, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13575621 in words is "thirteen million, five hundred seventy-five thousand, six hundred twenty-one".