5257391 has 2 divisors, whose sum is σ = 5257392. Its totient is φ = 5257390.

The previous prime is 5257379. The next prime is 5257393. The reversal of 5257391 is 1937525.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5257391 - 2¹⁰ = 5256367 is a prime.

Together with 5257393, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5257393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628695 + 2628696.

It is an arithmetic number, because the mean of its divisors is an integer number (2628696).

Almost surely, 2^5257391 is an apocalyptic number.

5257391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5257391 is an equidigital number, since it uses as much as digits as its factorization.

5257391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 32.

The square root of 5257391 is about 2292.9001286580. The cubic root of 5257391 is about 173.8828537243.

The spelling of 5257391 in words is "five million, two hundred fifty-seven thousand, three hundred ninety-one".