142759809 has 6 divisors (see below), whose sum is σ = 206208626. Its totient is φ = 95173200.

The previous prime is 142759789. The next prime is 142759817. The reversal of 142759809 is 908957241.

It can be written as a sum of positive squares in only one way, i.e., 83777409 + 58982400 = 9153^2 + 7680^2 .

It is not a de Polignac number, because 142759809 - 2⁵ = 142759777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142759879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7931092 + ... + 7931109.

Almost surely, 2^142759809 is an apocalyptic number.

It is an amenable number.

142759809 is a deficient number, since it is larger than the sum of its proper divisors (63448817).

142759809 is a wasteful number, since it uses less digits than its factorization.

142759809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15862207 (or 15862204 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 142759809 is about 11948.2136321711. The cubic root of 142759809 is about 522.6392068209.

The spelling of 142759809 in words is "one hundred forty-two million, seven hundred fifty-nine thousand, eight hundred nine".