2456991 has 6 divisors (see below), whose sum is σ = 3549000. Its totient is φ = 1637988.

The previous prime is 2456989. The next prime is 2456999. The reversal of 2456991 is 1996542.

2456991 is a `hidden beast` number, since 2 + 4 + 569 + 91 = 666.

It is not a de Polignac number, because 2456991 - 2¹ = 2456989 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136491 + ... + 136508.

It is an arithmetic number, because the mean of its divisors is an integer number (591500).

2^2456991 is an apocalyptic number.

2456991 is a deficient number, since it is larger than the sum of its proper divisors (1092009).

2456991 is a wasteful number, since it uses less digits than its factorization.

2456991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273005 (or 273002 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2456991 is about 1567.4791864647. The cubic root of 2456991 is about 134.9380785983.

The spelling of 2456991 in words is "two million, four hundred fifty-six thousand, nine hundred ninety-one".