13670121 has 4 divisors (see below), whose sum is σ = 18226832. Its totient is φ = 9113412.

The previous prime is 13670117. The next prime is 13670143. The reversal of 13670121 is 12107631.

13670121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13670121 - 2² = 13670117 is a prime.

It is a super-3 number, since 3×13670121³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13670171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2278351 + ... + 2278356.

It is an arithmetic number, because the mean of its divisors is an integer number (4556708).

Almost surely, 2^13670121 is an apocalyptic number.

It is an amenable number.

13670121 is a deficient number, since it is larger than the sum of its proper divisors (4556711).

13670121 is an equidigital number, since it uses as much as digits as its factorization.

13670121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556710.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 13670121 is about 3697.3126727395. The cubic root of 13670121 is about 239.1061717900.

Adding to 13670121 its reverse (12107631), we get a palindrome (25777752).

The spelling of 13670121 in words is "thirteen million, six hundred seventy thousand, one hundred twenty-one".