26052561 has 12 divisors (see below), whose sum is σ = 37706292. Its totient is φ = 17333856.

The previous prime is 26052557. The next prime is 26052577. The reversal of 26052561 is 16525062.

26052561 is a `hidden beast` number, since 2 + 605 + 2 + 56 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 19580625 = 2544^2 + 4425^2 .

It is not a de Polignac number, because 26052561 - 2² = 26052557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26052581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2415 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (3142191).

Almost surely, 2^26052561 is an apocalyptic number.

It is an amenable number.

26052561 is a deficient number, since it is larger than the sum of its proper divisors (11653731).

26052561 is a wasteful number, since it uses less digits than its factorization.

26052561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760 (or 5757 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 26052561 is about 5104.1709414948. The cubic root of 26052561 is about 296.4491029251.

The spelling of 26052561 in words is "twenty-six million, fifty-two thousand, five hundred sixty-one".