26302561 has 4 divisors (see below), whose sum is σ = 26323092. Its totient is φ = 26282032.

The previous prime is 26302559. The next prime is 26302571. The reversal of 26302561 is 16520362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14017536 + 12285025 = 3744^2 + 3505^2 .

It is a cyclic number.

It is not a de Polignac number, because 26302561 - 2¹ = 26302559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26302511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8206 + ... + 10951.

It is an arithmetic number, because the mean of its divisors is an integer number (6580773).

Almost surely, 2^26302561 is an apocalyptic number.

It is an amenable number.

26302561 is a deficient number, since it is larger than the sum of its proper divisors (20531).

26302561 is a wasteful number, since it uses less digits than its factorization.

26302561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20530.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 26302561 is about 5128.6022462265. The cubic root of 26302561 is about 297.3943263318.

The spelling of 26302561 in words is "twenty-six million, three hundred two thousand, five hundred sixty-one".