13612121 has 8 divisors (see below), whose sum is σ = 14449824. Its totient is φ = 12778560.

The previous prime is 13612117. The next prime is 13612129. The reversal of 13612121 is 12121631.

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

It is not a de Polignac number, because 13612121 - 2² = 13612117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 13612121.

It is not an unprimeable number, because it can be changed into a prime (13612129) 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, 8126 + ... + 9656.

It is an arithmetic number, because the mean of its divisors is an integer number (1806228).

Almost surely, 2^13612121 is an apocalyptic number.

It is an amenable number.

13612121 is a deficient number, since it is larger than the sum of its proper divisors (837703).

13612121 is a wasteful number, since it uses less digits than its factorization.

13612121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

The product of its digits is 72, while the sum is 17.

The square root of 13612121 is about 3689.4608007133. The cubic root of 13612121 is about 238.7675301219.

Adding to 13612121 its reverse (12121631), we get a palindrome (25733752).

The spelling of 13612121 in words is "thirteen million, six hundred twelve thousand, one hundred twenty-one".