2540457 has 16 divisors (see below), whose sum is σ = 3866880. Its totient is φ = 1647216.

The previous prime is 2540443. The next prime is 2540479. The reversal of 2540457 is 7540452.

2540457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2540457 - 2⁴ = 2540441 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2540457.

It is not an unprimeable number, because it can be changed into a prime (2540407) 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 15 ways as a sum of consecutive naturals, for example, 273 + ... + 2270.

It is an arithmetic number, because the mean of its divisors is an integer number (241680).

2^2540457 is an apocalyptic number.

2540457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2540457 is a deficient number, since it is larger than the sum of its proper divisors (1326423).

2540457 is a wasteful number, since it uses less digits than its factorization.

2540457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2583 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 2540457 is about 1593.8811122540. The cubic root of 2540457 is about 136.4490813584.

The spelling of 2540457 in words is "two million, five hundred forty thousand, four hundred fifty-seven".