142739847 has 32 divisors (see below), whose sum is σ = 215183360. Its totient is φ = 93506400.

The previous prime is 142739843. The next prime is 142739867. The reversal of 142739847 is 748937241.

It is not a de Polignac number, because 142739847 - 2² = 142739843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142739843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639978 + ... + 640200.

It is an arithmetic number, because the mean of its divisors is an integer number (6724480).

Almost surely, 2^142739847 is an apocalyptic number.

142739847 is a deficient number, since it is larger than the sum of its proper divisors (72443513).

142739847 is a wasteful number, since it uses less digits than its factorization.

142739847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 142739847 is about 11947.3782479672. The cubic root of 142739847 is about 522.6148455990.

The spelling of 142739847 in words is "one hundred forty-two million, seven hundred thirty-nine thousand, eight hundred forty-seven".