2456391 has 16 divisors (see below), whose sum is σ = 3815424. Its totient is φ = 1376544.

The previous prime is 2456383. The next prime is 2456401. The reversal of 2456391 is 1936542.

It is not a de Polignac number, because 2456391 - 2³ = 2456383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456341) 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 in 15 ways as a sum of consecutive naturals, for example, 10 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (238464).

2^2456391 is an apocalyptic number.

2456391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2456391 is a deficient number, since it is larger than the sum of its proper divisors (1359033).

2456391 is a wasteful number, since it uses less digits than its factorization.

2456391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its digits is 6480, while the sum is 30.

The square root of 2456391 is about 1567.2877846777. The cubic root of 2456391 is about 134.9270936933.

The spelling of 2456391 in words is "two million, four hundred fifty-six thousand, three hundred ninety-one".