2540979 has 24 divisors (see below), whose sum is σ = 4279392. Its totient is φ = 1422720.

The previous prime is 2540969. The next prime is 2540981. The reversal of 2540979 is 9790452.

It is not a de Polignac number, because 2540979 - 2⁴ = 2540963 is a prime.

It is an Ulam number.

2540979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2540969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2959 + ... + 3719.

It is an arithmetic number, because the mean of its divisors is an integer number (178308).

2^2540979 is an apocalyptic number.

2540979 is a deficient number, since it is larger than the sum of its proper divisors (1738413).

2540979 is a wasteful number, since it uses less digits than its factorization.

2540979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 2540979 is about 1594.0448550778. The cubic root of 2540979 is about 136.4584263361.

The spelling of 2540979 in words is "two million, five hundred forty thousand, nine hundred seventy-nine".