72240142 has 8 divisors (see below), whose sum is σ = 116695656. Its totient is φ = 33341592.

The previous prime is 72240139. The next prime is 72240151. The reversal of 72240142 is 24104227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389208 + ... + 1389259.

It is an arithmetic number, because the mean of its divisors is an integer number (14586957).

Almost surely, 2^72240142 is an apocalyptic number.

72240142 is a deficient number, since it is larger than the sum of its proper divisors (44455514).

72240142 is a wasteful number, since it uses less digits than its factorization.

72240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778482.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 72240142 is about 8499.4200978655. The cubic root of 72240142 is about 416.4787656943.

Adding to 72240142 its reverse (24104227), we get a palindrome (96344369).

The spelling of 72240142 in words is "seventy-two million, two hundred forty thousand, one hundred forty-two".