142251187 has 12 divisors (see below), whose sum is σ = 157321440. Its totient is φ = 128507808.

The previous prime is 142251169. The next prime is 142251191. The reversal of 142251187 is 781152241.

142251187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142251187 - 2⁷ = 142251059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142251107) 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, 1012 + ... + 16897.

It is an arithmetic number, because the mean of its divisors is an integer number (13110120).

Almost surely, 2^142251187 is an apocalyptic number.

142251187 is a deficient number, since it is larger than the sum of its proper divisors (15070253).

142251187 is a wasteful number, since it uses less digits than its factorization.

142251187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982 (or 17969 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 142251187 is about 11926.9102034014. The cubic root of 142251187 is about 522.0177851478.

The spelling of 142251187 in words is "one hundred forty-two million, two hundred fifty-one thousand, one hundred eighty-seven".