142772187 has 8 divisors (see below), whose sum is σ = 190451520. Its totient is φ = 95137160.

The previous prime is 142772183. The next prime is 142772207. The reversal of 142772187 is 781277241.

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 142772187 - 2² = 142772183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142772183) 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 7 ways as a sum of consecutive naturals, for example, 2637 + ... + 17102.

It is an arithmetic number, because the mean of its divisors is an integer number (23806440).

Almost surely, 2^142772187 is an apocalyptic number.

142772187 is a deficient number, since it is larger than the sum of its proper divisors (47679333).

142772187 is a wasteful number, since it uses less digits than its factorization.

142772187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22153.

The product of its digits is 43904, while the sum is 39.

The square root of 142772187 is about 11948.7316063254. The cubic root of 142772187 is about 522.6543115416.

The spelling of 142772187 in words is "one hundred forty-two million, seven hundred seventy-two thousand, one hundred eighty-seven".