2457391 has 4 divisors (see below), whose sum is σ = 2466072. Its totient is φ = 2448712.

The previous prime is 2457383. The next prime is 2457397. The reversal of 2457391 is 1937542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2457391 - 2³ = 2457383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901 + ... + 4486.

It is an arithmetic number, because the mean of its divisors is an integer number (616518).

2^2457391 is an apocalyptic number.

2457391 is a deficient number, since it is larger than the sum of its proper divisors (8681).

2457391 is an equidigital number, since it uses as much as digits as its factorization.

2457391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680.

The product of its digits is 7560, while the sum is 31.

The square root of 2457391 is about 1567.6067746728. The cubic root of 2457391 is about 134.9454008748.

The spelling of 2457391 in words is "two million, four hundred fifty-seven thousand, three hundred ninety-one".