142739816 has 8 divisors (see below), whose sum is σ = 267637170. Its totient is φ = 71369904.

The previous prime is 142739813. The next prime is 142739843. The reversal of 142739816 is 618937241.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 61559716 = 9010^2 + 7846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (142739813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8921231 + ... + 8921246.

Almost surely, 2^142739816 is an apocalyptic number.

It is an amenable number.

142739816 is a deficient number, since it is larger than the sum of its proper divisors (124897354).

142739816 is a wasteful number, since it uses less digits than its factorization.

142739816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17842483 (or 17842479 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 142739816 is about 11947.3769506114. The cubic root of 142739816 is about 522.6148077654.

The spelling of 142739816 in words is "one hundred forty-two million, seven hundred thirty-nine thousand, eight hundred sixteen".