142909765 has 4 divisors (see below), whose sum is σ = 171491724. Its totient is φ = 114327808.

The previous prime is 142909759. The next prime is 142909777. The reversal of 142909765 is 567909241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567909241 = 107 ⋅5307563.

It can be written as a sum of positive squares in 2 ways, for example, as 39012516 + 103897249 = 6246^2 + 10193^2 .

It is a cyclic number.

It is not a de Polignac number, because 142909765 - 2³ = 142909757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14290972 + ... + 14290981.

It is an arithmetic number, because the mean of its divisors is an integer number (42872931).

Almost surely, 2^142909765 is an apocalyptic number.

It is an amenable number.

142909765 is a deficient number, since it is larger than the sum of its proper divisors (28581959).

142909765 is an equidigital number, since it uses as much as digits as its factorization.

142909765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28581958.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 142909765 is about 11954.4872328344. The cubic root of 142909765 is about 522.8221375311.

The spelling of 142909765 in words is "one hundred forty-two million, nine hundred nine thousand, seven hundred sixty-five".