142133665 has 4 divisors (see below), whose sum is σ = 170560404. Its totient is φ = 113706928.

The previous prime is 142133657. The next prime is 142133707. The reversal of 142133665 is 566331241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566331241 = 7 ⋅80904463.

It can be written as a sum of positive squares in 2 ways, for example, as 32638369 + 109495296 = 5713^2 + 10464^2 .

It is a cyclic number.

It is not a de Polignac number, because 142133665 - 2³ = 142133657 is a prime.

It is a Duffinian 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, 14213362 + ... + 14213371.

It is an arithmetic number, because the mean of its divisors is an integer number (42640101).

Almost surely, 2^142133665 is an apocalyptic number.

It is an amenable number.

142133665 is a deficient number, since it is larger than the sum of its proper divisors (28426739).

142133665 is an equidigital number, since it uses as much as digits as its factorization.

142133665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28426738.

The product of its digits is 12960, while the sum is 31.

The square root of 142133665 is about 11921.9824274321. The cubic root of 142133665 is about 521.8739890977.

The spelling of 142133665 in words is "one hundred forty-two million, one hundred thirty-three thousand, six hundred sixty-five".