142288715 has 4 divisors (see below), whose sum is σ = 170746464. Its totient is φ = 113830968.

The previous prime is 142288687. The next prime is 142288723. The reversal of 142288715 is 517882241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517882241 = 157 ⋅3298613.

It is a cyclic number.

It is not a de Polignac number, because 142288715 - 2¹² = 142284619 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, 14228867 + ... + 14228876.

It is an arithmetic number, because the mean of its divisors is an integer number (42686616).

Almost surely, 2^142288715 is an apocalyptic number.

142288715 is a deficient number, since it is larger than the sum of its proper divisors (28457749).

142288715 is an equidigital number, since it uses as much as digits as its factorization.

142288715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28457748.

The product of its digits is 35840, while the sum is 38.

The square root of 142288715 is about 11928.4833486911. The cubic root of 142288715 is about 522.0636864894.

The spelling of 142288715 in words is "one hundred forty-two million, two hundred eighty-eight thousand, seven hundred fifteen".