642142177 has 8 divisors (see below), whose sum is σ = 657431456. Its totient is φ = 626869152.

The previous prime is 642142169. The next prime is 642142213. The reversal of 642142177 is 771241246.

It is a happy number.

642142177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642142177 - 2³ = 642142169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642142477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120238 + ... + 125464.

It is an arithmetic number, because the mean of its divisors is an integer number (82178932).

Almost surely, 2^642142177 is an apocalyptic number.

It is an amenable number.

642142177 is a deficient number, since it is larger than the sum of its proper divisors (15289279).

642142177 is a wasteful number, since it uses less digits than its factorization.

642142177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127.

The product of its digits is 18816, while the sum is 34.

The square root of 642142177 is about 25340.5244026243. The cubic root of 642142177 is about 862.7343011708.

The spelling of 642142177 in words is "six hundred forty-two million, one hundred forty-two thousand, one hundred seventy-seven".