142320789 has 12 divisors (see below), whose sum is σ = 221388076. Its totient is φ = 87581952.

The previous prime is 142320781. The next prime is 142320809. The reversal of 142320789 is 987023241.

142320789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11675889 + 130644900 = 3417^2 + 11430^2 .

It is not a de Polignac number, because 142320789 - 2³ = 142320781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608092 + ... + 608325.

Almost surely, 2^142320789 is an apocalyptic number.

It is an amenable number.

142320789 is a deficient number, since it is larger than the sum of its proper divisors (79067287).

142320789 is a wasteful number, since it uses less digits than its factorization.

142320789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216436 (or 1216433 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 142320789 is about 11929.8277020249. The cubic root of 142320789 is about 522.1029105245.

The spelling of 142320789 in words is "one hundred forty-two million, three hundred twenty thousand, seven hundred eighty-nine".