26256521 has 2 divisors, whose sum is σ = 26256522. Its totient is φ = 26256520.

The previous prime is 26256511. The next prime is 26256533. The reversal of 26256521 is 12565262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 3024121 = 4820^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 26256521 - 2²² = 22062217 is a prime.

It is not a weakly prime, because it can be changed into another prime (26256511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13128260 + 13128261.

It is an arithmetic number, because the mean of its divisors is an integer number (13128261).

Almost surely, 2^26256521 is an apocalyptic number.

It is an amenable number.

26256521 is a deficient number, since it is larger than the sum of its proper divisors (1).

26256521 is an equidigital number, since it uses as much as digits as its factorization.

26256521 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 26256521 is about 5124.1117278998. Note that the first 3 decimals coincide. The cubic root of 26256521 is about 297.2207053244.

The spelling of 26256521 in words is "twenty-six million, two hundred fifty-six thousand, five hundred twenty-one".