2540456 has 8 divisors (see below), whose sum is σ = 4763370. Its totient is φ = 1270224.

The previous prime is 2540443. The next prime is 2540479. The reversal of 2540456 is 6540452.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 320356 = 1490^2 + 566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158771 + ... + 158786.

2^2540456 is an apocalyptic number.

It is an amenable number.

2540456 is a deficient number, since it is larger than the sum of its proper divisors (2222914).

2540456 is a wasteful number, since it uses less digits than its factorization.

2540456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317563 (or 317559 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2540456 is about 1593.8807985543. The cubic root of 2540456 is about 136.4490634549.

The spelling of 2540456 in words is "two million, five hundred forty thousand, four hundred fifty-six".