1540172242 has 16 divisors (see below), whose sum is σ = 2641205952. Its totient is φ = 659846160.

The previous prime is 1540172213. The next prime is 1540172251. The reversal of 1540172242 is 2422710451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540172242.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26892 + ... + 61672.

It is an arithmetic number, because the mean of its divisors is an integer number (165075372).

Almost surely, 2^1540172242 is an apocalyptic number.

1540172242 is a deficient number, since it is larger than the sum of its proper divisors (1101033710).

1540172242 is a wasteful number, since it uses less digits than its factorization.

1540172242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37953.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 1540172242 is about 39245.0282456262. The cubic root of 1540172242 is about 1154.8434017432.

Adding to 1540172242 its reverse (2422710451), we get a palindrome (3962882693).

The spelling of 1540172242 in words is "one billion, five hundred forty million, one hundred seventy-two thousand, two hundred forty-two".