13621104 has 60 divisors (see below), whose sum is σ = 43569136. Its totient is φ = 3891456.

The previous prime is 13621099. The next prime is 13621109. The reversal of 13621104 is 40112631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13621099) and next prime (13621109).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5749 + ... + 7764.

Almost surely, 2^13621104 is an apocalyptic number.

13621104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13621104 is an abundant number, since it is smaller than the sum of its proper divisors (29948032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13621104 is a wasteful number, since it uses less digits than its factorization.

13621104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534 (or 13525 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13621104 is about 3690.6779864952. The cubic root of 13621104 is about 238.8200415828.

Adding to 13621104 its reverse (40112631), we get a palindrome (53733735).

The spelling of 13621104 in words is "thirteen million, six hundred twenty-one thousand, one hundred four".