15798161 has 4 divisors (see below), whose sum is σ = 16183524. Its totient is φ = 15412800.

The previous prime is 15798119. The next prime is 15798163. The reversal of 15798161 is 16189751.

15798161 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1547536 + 14250625 = 1244^2 + 3775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15798161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15798163) 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, 192620 + ... + 192701.

It is an arithmetic number, because the mean of its divisors is an integer number (4045881).

Almost surely, 2^15798161 is an apocalyptic number.

It is an amenable number.

15798161 is a deficient number, since it is larger than the sum of its proper divisors (385363).

15798161 is an equidigital number, since it uses as much as digits as its factorization.

15798161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385362.

The product of its digits is 15120, while the sum is 38.

The square root of 15798161 is about 3974.6900508090. The cubic root of 15798161 is about 250.9201345879.

The spelling of 15798161 in words is "fifteen million, seven hundred ninety-eight thousand, one hundred sixty-one".