26252561 has 2 divisors, whose sum is σ = 26252562. Its totient is φ = 26252560.

The previous prime is 26252549. The next prime is 26252609. The reversal of 26252561 is 16525262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26204161 + 48400 = 5119^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 26252561 - 2¹⁸ = 25990417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26252521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13126280 + 13126281.

It is an arithmetic number, because the mean of its divisors is an integer number (13126281).

Almost surely, 2^26252561 is an apocalyptic number.

It is an amenable number.

26252561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26252561 is an equidigital number, since it uses as much as digits as its factorization.

26252561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 26252561 is about 5123.7253048929. The cubic root of 26252561 is about 297.2057623297.

The spelling of 26252561 in words is "twenty-six million, two hundred fifty-two thousand, five hundred sixty-one".