26015861 has 2 divisors, whose sum is σ = 26015862. Its totient is φ = 26015860.

The previous prime is 26015839. The next prime is 26015881. The reversal of 26015861 is 16851062.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16443025 + 9572836 = 4055^2 + 3094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26015861 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26015881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13007930 + 13007931.

It is an arithmetic number, because the mean of its divisors is an integer number (13007931).

Almost surely, 2^26015861 is an apocalyptic number.

It is an amenable number.

26015861 is a deficient number, since it is larger than the sum of its proper divisors (1).

26015861 is an equidigital number, since it uses as much as digits as its factorization.

26015861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 26015861 is about 5100.5745754768. The cubic root of 26015861 is about 296.3098358132.

The spelling of 26015861 in words is "twenty-six million, fifteen thousand, eight hundred sixty-one".