142888187 has 4 divisors (see below), whose sum is σ = 153879600. Its totient is φ = 131896776.

The previous prime is 142888171. The next prime is 142888201. The reversal of 142888187 is 781888241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781888241 = 3467 ⋅225523.

It is a cyclic number.

It is not a de Polignac number, because 142888187 - 2⁴ = 142888171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142888787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5495687 + ... + 5495712.

It is an arithmetic number, because the mean of its divisors is an integer number (38469900).

Almost surely, 2^142888187 is an apocalyptic number.

142888187 is a deficient number, since it is larger than the sum of its proper divisors (10991413).

142888187 is a wasteful number, since it uses less digits than its factorization.

142888187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10991412.

The product of its digits is 229376, while the sum is 47.

The square root of 142888187 is about 11953.5846924678. The cubic root of 142888187 is about 522.7958225019.

The spelling of 142888187 in words is "one hundred forty-two million, eight hundred eighty-eight thousand, one hundred eighty-seven".