142116779 has 4 divisors (see below), whose sum is σ = 162419184. Its totient is φ = 121814376.

The previous prime is 142116769. The next prime is 142116811. The reversal of 142116779 is 977611241.

142116779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142116779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142116739) 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, 10151192 + ... + 10151205.

It is an arithmetic number, because the mean of its divisors is an integer number (40604796).

Almost surely, 2^142116779 is an apocalyptic number.

142116779 is a deficient number, since it is larger than the sum of its proper divisors (20302405).

142116779 is an equidigital number, since it uses as much as digits as its factorization.

142116779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20302404.

The product of its digits is 21168, while the sum is 38.

The square root of 142116779 is about 11921.2742188073. The cubic root of 142116779 is about 521.8533214321.

The spelling of 142116779 in words is "one hundred forty-two million, one hundred sixteen thousand, seven hundred seventy-nine".