15105961 has 4 divisors (see below), whose sum is σ = 16267972. Its totient is φ = 13943952.

The previous prime is 15105949. The next prime is 15105967. The reversal of 15105961 is 16950151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16950151 = 3121 ⋅5431.

It can be written as a sum of positive squares in 2 ways, for example, as 5221225 + 9884736 = 2285^2 + 3144^2 .

It is a cyclic number.

It is not a de Polignac number, because 15105961 - 2⁹ = 15105449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15105967) 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, 580986 + ... + 581011.

It is an arithmetic number, because the mean of its divisors is an integer number (4066993).

Almost surely, 2^15105961 is an apocalyptic number.

It is an amenable number.

15105961 is a deficient number, since it is larger than the sum of its proper divisors (1162011).

15105961 is a wasteful number, since it uses less digits than its factorization.

15105961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162010.

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

The square root of 15105961 is about 3886.6387792024. The cubic root of 15105961 is about 247.2005615851.

The spelling of 15105961 in words is "fifteen million, one hundred five thousand, nine hundred sixty-one".