142887939 has 4 divisors (see below), whose sum is σ = 190517256. Its totient is φ = 95258624.

The previous prime is 142887917. The next prime is 142887971. The reversal of 142887939 is 939788241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142887939 - 2⁸ = 142887683 is a prime.

It is a super-3 number, since 3×142887939³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 142887891 and 142887900.

It is not an unprimeable number, because it can be changed into a prime (142887989) 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, 23814654 + ... + 23814659.

It is an arithmetic number, because the mean of its divisors is an integer number (47629314).

Almost surely, 2^142887939 is an apocalyptic number.

142887939 is a deficient number, since it is larger than the sum of its proper divisors (47629317).

142887939 is an equidigital number, since it uses as much as digits as its factorization.

142887939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47629316.

The product of its digits is 870912, while the sum is 51.

The square root of 142887939 is about 11953.5743190060. The cubic root of 142887939 is about 522.7955200429.

The spelling of 142887939 in words is "one hundred forty-two million, eight hundred eighty-seven thousand, nine hundred thirty-nine".