1540242404 has 12 divisors (see below), whose sum is σ = 2698934700. Its totient is φ = 769118208.

The previous prime is 1540242373. The next prime is 1540242419. The reversal of 1540242404 is 4042420451.

It can be written as a sum of positive squares in 2 ways, for example, as 676000000 + 864242404 = 26000^2 + 29398^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247289 + ... + 253440.

It is an arithmetic number, because the mean of its divisors is an integer number (224911225).

Almost surely, 2^1540242404 is an apocalyptic number.

It is an amenable number.

1540242404 is a deficient number, since it is larger than the sum of its proper divisors (1158692296).

1540242404 is a wasteful number, since it uses less digits than its factorization.

1540242404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501502 (or 501500 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1540242404 is about 39245.9221321146. The cubic root of 1540242404 is about 1154.8609376374.

Adding to 1540242404 its reverse (4042420451), we get a palindrome (5582662855).

The spelling of 1540242404 in words is "one billion, five hundred forty million, two hundred forty-two thousand, four hundred four".