13420161 has 28 divisors (see below), whose sum is σ = 20657700. Its totient is φ = 8709120.

The previous prime is 13420153. The next prime is 13420177. The reversal of 13420161 is 16102431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 9641025 = 1944^2 + 3105^2 .

It is not a de Polignac number, because 13420161 - 2³ = 13420153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13420181) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 29665 + ... + 30113.

It is an arithmetic number, because the mean of its divisors is an integer number (737775).

Almost surely, 2^13420161 is an apocalyptic number.

It is an amenable number.

13420161 is a deficient number, since it is larger than the sum of its proper divisors (7237539).

13420161 is an frugal number, since it uses more digits than its factorization.

13420161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 493 counting only the distinct ones).

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

The square root of 13420161 is about 3663.3537912683. The cubic root of 13420161 is about 237.6398349189.

Adding to 13420161 its reverse (16102431), we get a palindrome (29522592).

The spelling of 13420161 in words is "thirteen million, four hundred twenty thousand, one hundred sixty-one".