142856739 has 6 divisors (see below), whose sum is σ = 206348636. Its totient is φ = 95237820.

The previous prime is 142856737. The next prime is 142856743. The reversal of 142856739 is 937658241.

It is not a de Polignac number, because 142856739 - 2¹ = 142856737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142856694 and 142856703.

It is not an unprimeable number, because it can be changed into a prime (142856737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7936477 + ... + 7936494.

Almost surely, 2^142856739 is an apocalyptic number.

142856739 is a deficient number, since it is larger than the sum of its proper divisors (63491897).

142856739 is a wasteful number, since it uses less digits than its factorization.

142856739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872977 (or 15872974 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 142856739 is about 11952.2691987756. The cubic root of 142856739 is about 522.7574659620.

The spelling of 142856739 in words is "one hundred forty-two million, eight hundred fifty-six thousand, seven hundred thirty-nine".