13621125 has 32 divisors (see below), whose sum is σ = 25908480. Its totient is φ = 6225600.

The previous prime is 13621123. The next prime is 13621147. The reversal of 13621125 is 52112631.

It is not a de Polignac number, because 13621125 - 2¹ = 13621123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (809640).

Almost surely, 2^13621125 is an apocalyptic number.

13621125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13621125 is a deficient number, since it is larger than the sum of its proper divisors (12287355).

13621125 is an equidigital number, since it uses as much as digits as its factorization.

13621125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5204 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 13621125 is about 3690.6808314998. The cubic root of 13621125 is about 238.8201643144.

Adding to 13621125 its reverse (52112631), we get a palindrome (65733756).

The spelling of 13621125 in words is "thirteen million, six hundred twenty-one thousand, one hundred twenty-five".