142320715 has 4 divisors (see below), whose sum is σ = 170784864. Its totient is φ = 113856568.

The previous prime is 142320691. The next prime is 142320733. The reversal of 142320715 is 517023241.

It is a happy number.

142320715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517023241 = 7 ⋅73860463.

It is a cyclic number.

It is not a de Polignac number, because 142320715 - 2⁵ = 142320683 is a prime.

It is a super-2 number, since 2×142320715² = 40510371836222450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142320715.

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, 14232067 + ... + 14232076.

It is an arithmetic number, because the mean of its divisors is an integer number (42696216).

Almost surely, 2^142320715 is an apocalyptic number.

142320715 is a deficient number, since it is larger than the sum of its proper divisors (28464149).

142320715 is an equidigital number, since it uses as much as digits as its factorization.

142320715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28464148.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 142320715 is about 11929.8246005547. The cubic root of 142320715 is about 522.1028200350.

Adding to 142320715 its reverse (517023241), we get a palindrome (659343956).

The spelling of 142320715 in words is "one hundred forty-two million, three hundred twenty thousand, seven hundred fifteen".