2391457 has 4 divisors (see below), whose sum is σ = 2395540. Its totient is φ = 2387376.

The previous prime is 2391451. The next prime is 2391461. The reversal of 2391457 is 7541932.

2391457 is nontrivially palindromic in base 6.

2391457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1515361 + 876096 = 1231^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391457 - 2³ = 2391449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391451) 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 in 3 ways as a sum of consecutive naturals, for example, 978 + ... + 2395.

It is an arithmetic number, because the mean of its divisors is an integer number (598885).

2^2391457 is an apocalyptic number.

It is an amenable number.

2391457 is a deficient number, since it is larger than the sum of its proper divisors (4083).

2391457 is an equidigital number, since it uses as much as digits as its factorization.

2391457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082.

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

The square root of 2391457 is about 1546.4336390547. The cubic root of 2391457 is about 133.7275409927.

The spelling of 2391457 in words is "two million, three hundred ninety-one thousand, four hundred fifty-seven".