26251571 has 2 divisors, whose sum is σ = 26251572. Its totient is φ = 26251570.

The previous prime is 26251549. The next prime is 26251573. The reversal of 26251571 is 17515262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26251571 - 2¹⁰ = 26250547 is a prime.

Together with 26251573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26251573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13125785 + 13125786.

It is an arithmetic number, because the mean of its divisors is an integer number (13125786).

Almost surely, 2^26251571 is an apocalyptic number.

26251571 is a deficient number, since it is larger than the sum of its proper divisors (1).

26251571 is an equidigital number, since it uses as much as digits as its factorization.

26251571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 26251571 is about 5123.6286945875. The cubic root of 26251571 is about 297.2020263462.

It can be divided in two parts, 262515 and 71, that multiplied together give a triangular number (18638565 = T₆₁₀₅).

The spelling of 26251571 in words is "twenty-six million, two hundred fifty-one thousand, five hundred seventy-one".