13672161 has 6 divisors (see below), whose sum is σ = 19748690. Its totient is φ = 9114768.

The previous prime is 13672157. The next prime is 13672163. The reversal of 13672161 is 16127631.

13672161 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 5377761 = 2880^2 + 2319^2 .

It is not a de Polignac number, because 13672161 - 2² = 13672157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13672163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 759556 + ... + 759573.

Almost surely, 2^13672161 is an apocalyptic number.

It is an amenable number.

13672161 is a deficient number, since it is larger than the sum of its proper divisors (6076529).

13672161 is a wasteful number, since it uses less digits than its factorization.

13672161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519135 (or 1519132 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 13672161 is about 3697.5885384937. The cubic root of 13672161 is about 239.1180651822.

Adding to 13672161 its reverse (16127631), we get a palindrome (29799792).

The spelling of 13672161 in words is "thirteen million, six hundred seventy-two thousand, one hundred sixty-one".