13161858 has 8 divisors (see below), whose sum is σ = 26323728. Its totient is φ = 4387284.

The previous prime is 13161857. The next prime is 13161881. The reversal of 13161858 is 85816131.

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

13161858 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13161857) 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, 1096816 + ... + 1096827.

It is an arithmetic number, because the mean of its divisors is an integer number (3290466).

Almost surely, 2^13161858 is an apocalyptic number.

13161858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13161858 is a wasteful number, since it uses less digits than its factorization.

13161858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193648.

The product of its digits is 5760, while the sum is 33.

The square root of 13161858 is about 3627.9275075448. The cubic root of 13161858 is about 236.1052986968.

Adding to 13161858 its reverse (85816131), we get a palindrome (98977989).

The spelling of 13161858 in words is "thirteen million, one hundred sixty-one thousand, eight hundred fifty-eight".