26057021 has 2 divisors, whose sum is σ = 26057022. Its totient is φ = 26057020.

The previous prime is 26056997. The next prime is 26057029. The reversal of 26057021 is 12075062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13060996 + 12996025 = 3614^2 + 3605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26057021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26057029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13028510 + 13028511.

It is an arithmetic number, because the mean of its divisors is an integer number (13028511).

Almost surely, 2^26057021 is an apocalyptic number.

It is an amenable number.

26057021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26057021 is an equidigital number, since it uses as much as digits as its factorization.

26057021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 26057021 is about 5104.6078203913. The cubic root of 26057021 is about 296.4660185693.

The spelling of 26057021 in words is "twenty-six million, fifty-seven thousand, twenty-one".