2540751 has 4 divisors (see below), whose sum is σ = 3387672. Its totient is φ = 1693832.

The previous prime is 2540749. The next prime is 2540761. The reversal of 2540751 is 1570452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2540751 - 2¹ = 2540749 is a prime.

It is a D-number.

2540751 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423456 + ... + 423461.

It is an arithmetic number, because the mean of its divisors is an integer number (846918).

2^2540751 is an apocalyptic number.

2540751 is a deficient number, since it is larger than the sum of its proper divisors (846921).

2540751 is an equidigital number, since it uses as much as digits as its factorization.

2540751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846920.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 2540751 is about 1593.9733372927. The cubic root of 2540751 is about 136.4543447791.

Subtracting from 2540751 its reverse (1570452), we obtain a cube (970299 = 99³).

The spelling of 2540751 in words is "two million, five hundred forty thousand, seven hundred fifty-one".