1540242403 has 32 divisors (see below), whose sum is σ = 1926604800. Its totient is φ = 1202294016.

The previous prime is 1540242373. The next prime is 1540242419. The reversal of 1540242403 is 3042420451.

It is a happy number.

It is not a de Polignac number, because 1540242403 - 2²⁵ = 1506687971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540242463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338578 + ... + 343096.

It is an arithmetic number, because the mean of its divisors is an integer number (60206400).

Almost surely, 2^1540242403 is an apocalyptic number.

1540242403 is a deficient number, since it is larger than the sum of its proper divisors (386362397).

1540242403 is a wasteful number, since it uses less digits than its factorization.

1540242403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1540242403 is about 39245.9221193744. The cubic root of 1540242403 is about 1154.8609373875.

Adding to 1540242403 its reverse (3042420451), we get a palindrome (4582662854).

The spelling of 1540242403 in words is "one billion, five hundred forty million, two hundred forty-two thousand, four hundred three".