13620055 has 16 divisors (see below), whose sum is σ = 17297280. Its totient is φ = 10266912.

The previous prime is 13620041. The next prime is 13620059. The reversal of 13620055 is 55002631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13620055 - 2⁵ = 13620023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620059) 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, 28932 + ... + 29398.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^13620055 is an apocalyptic number.

13620055 is a deficient number, since it is larger than the sum of its proper divisors (3677225).

13620055 is a wasteful number, since it uses less digits than its factorization.

13620055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 13620055 is about 3690.5358689491. The cubic root of 13620055 is about 238.8139106883.

Adding to 13620055 its reverse (55002631), we get a palindrome (68622686).

The spelling of 13620055 in words is "thirteen million, six hundred twenty thousand, fifty-five".