13621055 has 8 divisors (see below), whose sum is σ = 18680352. Its totient is φ = 9340128.

The previous prime is 13621051. The next prime is 13621087. The reversal of 13621055 is 55012631.

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

It is not a de Polignac number, because 13621055 - 2² = 13621051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13621055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621051) 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, 194552 + ... + 194621.

It is an arithmetic number, because the mean of its divisors is an integer number (2335044).

Almost surely, 2^13621055 is an apocalyptic number.

13621055 is a deficient number, since it is larger than the sum of its proper divisors (5059297).

13621055 is an equidigital number, since it uses as much as digits as its factorization.

13621055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389185.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 13621055 is about 3690.6713481425. The cubic root of 13621055 is about 238.8197552087.

Adding to 13621055 its reverse (55012631), we get a palindrome (68633686).

The spelling of 13621055 in words is "thirteen million, six hundred twenty-one thousand, fifty-five".