26242561 has 2 divisors, whose sum is σ = 26242562. Its totient is φ = 26242560.

The previous prime is 26242483. The next prime is 26242597. The reversal of 26242561 is 16524262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 1640961 = 4960^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 26242561 - 2¹⁷ = 26111489 is a prime.

It is not a weakly prime, because it can be changed into another prime (26242061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13121280 + 13121281.

It is an arithmetic number, because the mean of its divisors is an integer number (13121281).

Almost surely, 2^26242561 is an apocalyptic number.

It is an amenable number.

26242561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26242561 is an equidigital number, since it uses as much as digits as its factorization.

26242561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 26242561 is about 5122.7493594749. The cubic root of 26242561 is about 297.1680208045.

The spelling of 26242561 in words is "twenty-six million, two hundred forty-two thousand, five hundred sixty-one".