15396961 has 4 divisors (see below), whose sum is σ = 15476932. Its totient is φ = 15316992.

The previous prime is 15396943. The next prime is 15396991. The reversal of 15396961 is 16969351.

15396961 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 9241600 + 6155361 = 3040^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 15396961 - 2¹⁷ = 15265889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15396991) 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, 39696 + ... + 40081.

It is an arithmetic number, because the mean of its divisors is an integer number (3869233).

Almost surely, 2^15396961 is an apocalyptic number.

It is an amenable number.

15396961 is a deficient number, since it is larger than the sum of its proper divisors (79971).

15396961 is an equidigital number, since it uses as much as digits as its factorization.

15396961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79970.

The product of its digits is 43740, while the sum is 40.

The square root of 15396961 is about 3923.8961505116. The cubic root of 15396961 is about 248.7778269081. Note that the first 3 decimals are identical.

The spelling of 15396961 in words is "fifteen million, three hundred ninety-six thousand, nine hundred sixty-one".