26285257 has 2 divisors, whose sum is σ = 26285258. Its totient is φ = 26285256.

The previous prime is 26285243. The next prime is 26285261. The reversal of 26285257 is 75258262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21427641 + 4857616 = 4629^2 + 2204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26285257 is a prime.

It is a super-3 number, since 3×26285257³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (26282257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13142628 + 13142629.

It is an arithmetic number, because the mean of its divisors is an integer number (13142629).

Almost surely, 2^26285257 is an apocalyptic number.

It is an amenable number.

26285257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26285257 is an equidigital number, since it uses as much as digits as its factorization.

26285257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 26285257 is about 5126.9149593103. The cubic root of 26285257 is about 297.3290951635.

It can be divided in two parts, 2628 and 5257, that multiplied together give a triangular number (13815396 = T₅₂₅₆).

The spelling of 26285257 in words is "twenty-six million, two hundred eighty-five thousand, two hundred fifty-seven".