142720556 has 12 divisors (see below), whose sum is σ = 272466600. Its totient is φ = 64872960.

The previous prime is 142720553. The next prime is 142720561. The reversal of 142720556 is 655027241.

It is not an unprimeable number, because it can be changed into a prime (142720553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621781 + ... + 1621868.

It is an arithmetic number, because the mean of its divisors is an integer number (22705550).

Almost surely, 2^142720556 is an apocalyptic number.

It is an amenable number.

142720556 is a deficient number, since it is larger than the sum of its proper divisors (129746044).

142720556 is a wasteful number, since it uses less digits than its factorization.

142720556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243664 (or 3243662 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 142720556 is about 11946.5708887530. The cubic root of 142720556 is about 522.5913010938.

Adding to 142720556 its reverse (655027241), we get a palindrome (797747797).

The spelling of 142720556 in words is "one hundred forty-two million, seven hundred twenty thousand, five hundred fifty-six".