26122861 has 4 divisors (see below), whose sum is σ = 26147772. Its totient is φ = 26097952.

The previous prime is 26122819. The next prime is 26122867. The reversal of 26122861 is 16822162.

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 10361961 + 15760900 = 3219^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 26122861 - 2¹⁵ = 26090093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26122867) 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, 10810 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (6536943).

Almost surely, 2^26122861 is an apocalyptic number.

It is an amenable number.

26122861 is a deficient number, since it is larger than the sum of its proper divisors (24911).

26122861 is a wasteful number, since it uses less digits than its factorization.

26122861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24910.

The product of its digits is 2304, while the sum is 28.

The square root of 26122861 is about 5111.0528269624. The cubic root of 26122861 is about 296.7155086580.

The spelling of 26122861 in words is "twenty-six million, one hundred twenty-two thousand, eight hundred sixty-one".