2257391 has 2 divisors, whose sum is σ = 2257392. Its totient is φ = 2257390.

The previous prime is 2257373. The next prime is 2257397. The reversal of 2257391 is 1937522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2257391 - 2¹⁰ = 2256367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128695 + 1128696.

It is an arithmetic number, because the mean of its divisors is an integer number (1128696).

2^2257391 is an apocalyptic number.

2257391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257391 is an equidigital number, since it uses as much as digits as its factorization.

2257391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 2257391 is about 1502.4616467651. The cubic root of 2257391 is about 131.1803936285.

The spelling of 2257391 in words is "two million, two hundred fifty-seven thousand, three hundred ninety-one".