1002540404 has 12 divisors (see below), whose sum is σ = 1760969700. Its totient is φ = 499406208.

The previous prime is 1002540389. The next prime is 1002540433. The reversal of 1002540404 is 4040452001.

It can be written as a sum of positive squares in 2 ways, for example, as 176092900 + 826447504 = 13270^2 + 28748^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464789 + ... + 466940.

It is an arithmetic number, because the mean of its divisors is an integer number (146747475).

Almost surely, 2^1002540404 is an apocalyptic number.

It is an amenable number.

1002540404 is a deficient number, since it is larger than the sum of its proper divisors (758429296).

1002540404 is a wasteful number, since it uses less digits than its factorization.

1002540404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932002 (or 932000 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1002540404 is about 31662.9184378193. The cubic root of 1002540404 is about 1000.8460852712.

Adding to 1002540404 its reverse (4040452001), we get a palindrome (5042992405).

The spelling of 1002540404 in words is "one billion, two million, five hundred forty thousand, four hundred four".