2540742 has 8 divisors (see below), whose sum is σ = 5081496. Its totient is φ = 846912.

The previous prime is 2540723. The next prime is 2540743. The reversal of 2540742 is 2470452.

It is a sphenic number, since it is the product of 3 distinct primes.

2540742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540743) 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, 211723 + ... + 211734.

It is an arithmetic number, because the mean of its divisors is an integer number (635187).

2^2540742 is an apocalyptic number.

2540742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540742 is a wasteful number, since it uses less digits than its factorization.

2540742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423462.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 2540742 is about 1593.9705141564. The cubic root of 2540742 is about 136.4541836600.

The spelling of 2540742 in words is "two million, five hundred forty thousand, seven hundred forty-two".