142194687 has 16 divisors (see below), whose sum is σ = 192517248. Its totient is φ = 93342240.

The previous prime is 142194673. The next prime is 142194691. The reversal of 142194687 is 786491241.

It is not a de Polignac number, because 142194687 - 2⁸ = 142194431 is a prime.

It is a super-2 number, since 2×142194687² = 40438658022055938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142194607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92112 + ... + 93642.

It is an arithmetic number, because the mean of its divisors is an integer number (12032328).

Almost surely, 2^142194687 is an apocalyptic number.

142194687 is a deficient number, since it is larger than the sum of its proper divisors (50322561).

142194687 is a wasteful number, since it uses less digits than its factorization.

142194687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 96768, while the sum is 42.

The square root of 142194687 is about 11924.5413748286. The cubic root of 142194687 is about 521.9486634971.

The spelling of 142194687 in words is "one hundred forty-two million, one hundred ninety-four thousand, six hundred eighty-seven".