2540401042 has 48 divisors (see below), whose sum is σ = 4205215872. Its totient is φ = 1149694560.

The previous prime is 2540401021. The next prime is 2540401043. The reversal of 2540401042 is 2401040452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2540401043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1458292 + ... + 1460032.

It is an arithmetic number, because the mean of its divisors is an integer number (87608664).

Almost surely, 2^2540401042 is an apocalyptic number.

2540401042 is a deficient number, since it is larger than the sum of its proper divisors (1664814830).

2540401042 is a wasteful number, since it uses less digits than its factorization.

2540401042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2540401042 is about 50402.3912329564. The cubic root of 2540401042 is about 1364.4807950794.

Adding to 2540401042 its reverse (2401040452), we get a palindrome (4941441494).

The spelling of 2540401042 in words is "two billion, five hundred forty million, four hundred one thousand, forty-two".