16105861 has 2 divisors, whose sum is σ = 16105862. Its totient is φ = 16105860.

The previous prime is 16105849. The next prime is 16105871. The reversal of 16105861 is 16850161.

16105861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 185761 = 3990^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 16105861 - 2⁵ = 16105829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16105871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052930 + 8052931.

It is an arithmetic number, because the mean of its divisors is an integer number (8052931).

Almost surely, 2^16105861 is an apocalyptic number.

It is an amenable number.

16105861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16105861 is an equidigital number, since it uses as much as digits as its factorization.

16105861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 16105861 is about 4013.2108093147. The cubic root of 16105861 is about 252.5387242507.

The spelling of 16105861 in words is "sixteen million, one hundred five thousand, eight hundred sixty-one".