5261257 has 6 divisors (see below), whose sum is σ = 5365262. Its totient is φ = 5159232.

The previous prime is 5261251. The next prime is 5261261. The reversal of 5261257 is 7521625.

It can be written as a sum of positive squares in 3 ways, for example, as 491401 + 4769856 = 701^2 + 2184^2 .

It is not a de Polignac number, because 5261257 - 2⁷ = 5261129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5261251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1873 + ... + 3745.

Almost surely, 2^5261257 is an apocalyptic number.

5261257 is the 1873-rd pentagonal number.

It is an amenable number.

5261257 is a deficient number, since it is larger than the sum of its proper divisors (104005).

5261257 is an equidigital number, since it uses as much as digits as its factorization.

5261257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979 (or 1926 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 5261257 is about 2293.7430108885. The cubic root of 5261257 is about 173.9254646192.

The spelling of 5261257 in words is "five million, two hundred sixty-one thousand, two hundred fifty-seven".