142178887 has 4 divisors (see below), whose sum is σ = 142202776. Its totient is φ = 142155000.

The previous prime is 142178873. The next prime is 142178899. The reversal of 142178887 is 788871241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 142178887 - 2⁷ = 142178759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142178867) 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, 4933 + ... + 17569.

It is an arithmetic number, because the mean of its divisors is an integer number (35550694).

Almost surely, 2^142178887 is an apocalyptic number.

142178887 is a deficient number, since it is larger than the sum of its proper divisors (23889).

142178887 is a wasteful number, since it uses less digits than its factorization.

142178887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23888.

The product of its digits is 200704, while the sum is 46.

The square root of 142178887 is about 11923.8788571505. The cubic root of 142178887 is about 521.9293306267.

It can be divided in two parts, 14217 and 8887, that added together give a square (23104 = 152²).

The spelling of 142178887 in words is "one hundred forty-two million, one hundred seventy-eight thousand, eight hundred eighty-seven".