2540904247 has 8 divisors (see below), whose sum is σ = 2905799552. Its totient is φ = 2176486200.

The previous prime is 2540904241. The next prime is 2540904253. The reversal of 2540904247 is 7424090452.

It is an interprime number because it is at equal distance from previous prime (2540904241) and next prime (2540904253).

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

It is not a de Polignac number, because 2540904247 - 2³ = 2540904239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540904241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107829 + ... + 129262.

It is an arithmetic number, because the mean of its divisors is an integer number (363224944).

Almost surely, 2^2540904247 is an apocalyptic number.

2540904247 is a deficient number, since it is larger than the sum of its proper divisors (364895305).

2540904247 is a wasteful number, since it uses less digits than its factorization.

2540904247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238629.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2540904247 is about 50407.3828620372. The cubic root of 2540904247 is about 1364.5708816730.

Adding to 2540904247 its reverse (7424090452), we get a palindrome (9964994699).

The spelling of 2540904247 in words is "two billion, five hundred forty million, nine hundred four thousand, two hundred forty-seven".