26602561 has 2 divisors, whose sum is σ = 26602562. Its totient is φ = 26602560.

The previous prime is 26602553. The next prime is 26602577. The reversal of 26602561 is 16520662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 18225 = 5156^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 26602561 - 2³ = 26602553 is a prime.

It is not a weakly prime, because it can be changed into another prime (26602861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13301280 + 13301281.

It is an arithmetic number, because the mean of its divisors is an integer number (13301281).

Almost surely, 2^26602561 is an apocalyptic number.

It is an amenable number.

26602561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26602561 is an equidigital number, since it uses as much as digits as its factorization.

26602561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 26602561 is about 5157.7670556162. The cubic root of 26602561 is about 298.5207214763.

The spelling of 26602561 in words is "twenty-six million, six hundred two thousand, five hundred sixty-one".