26131257 has 12 divisors (see below), whose sum is σ = 37832704. Its totient is φ = 17380440.

The previous prime is 26131223. The next prime is 26131267. The reversal of 26131257 is 75213162.

It is a happy number.

It is not a de Polignac number, because 26131257 - 2⁷ = 26131129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26131257.

It is not an unprimeable number, because it can be changed into a prime (26131207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032 + ... + 7302.

Almost surely, 2^26131257 is an apocalyptic number.

It is an amenable number.

26131257 is a deficient number, since it is larger than the sum of its proper divisors (11701447).

26131257 is a wasteful number, since it uses less digits than its factorization.

26131257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740 (or 6737 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 26131257 is about 5111.8741181684. The cubic root of 26131257 is about 296.7472938003.

The spelling of 26131257 in words is "twenty-six million, one hundred thirty-one thousand, two hundred fifty-seven".