15961105 has 4 divisors (see below), whose sum is σ = 19153332. Its totient is φ = 12768880.

The previous prime is 15961073. The next prime is 15961111. The reversal of 15961105 is 50116951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50116951 = 569 ⋅88079.

It can be written as a sum of positive squares in 2 ways, for example, as 9412624 + 6548481 = 3068^2 + 2559^2 .

It is not a de Polignac number, because 15961105 - 2⁵ = 15961073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596106 + ... + 1596115.

It is an arithmetic number, because the mean of its divisors is an integer number (4788333).

Almost surely, 2^15961105 is an apocalyptic number.

It is an amenable number.

15961105 is a deficient number, since it is larger than the sum of its proper divisors (3192227).

15961105 is an equidigital number, since it uses as much as digits as its factorization.

15961105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192226.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 15961105 is about 3995.1351666746. The cubic root of 15961105 is about 251.7798583456.

It can be divided in two parts, 1596 and 1105, that added together give a triangular number (2701 = T₇₃).

The spelling of 15961105 in words is "fifteen million, nine hundred sixty-one thousand, one hundred five".