142769665 has 4 divisors (see below), whose sum is σ = 171323604. Its totient is φ = 114215728.

The previous prime is 142769659. The next prime is 142769681. The reversal of 142769665 is 566967241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566967241 = 13757 ⋅41213.

It can be written as a sum of positive squares in 2 ways, for example, as 89245809 + 53523856 = 9447^2 + 7316^2 .

It is a cyclic number.

It is not a de Polignac number, because 142769665 - 2³ = 142769657 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, 14276962 + ... + 14276971.

It is an arithmetic number, because the mean of its divisors is an integer number (42830901).

Almost surely, 2^142769665 is an apocalyptic number.

It is an amenable number.

142769665 is a deficient number, since it is larger than the sum of its proper divisors (28553939).

142769665 is an equidigital number, since it uses as much as digits as its factorization.

142769665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28553938.

The product of its digits is 544320, while the sum is 46.

The square root of 142769665 is about 11948.6260716452. The cubic root of 142769665 is about 522.6512340470.

The spelling of 142769665 in words is "one hundred forty-two million, seven hundred sixty-nine thousand, six hundred sixty-five".