142248965 has 4 divisors (see below), whose sum is σ = 170698764. Its totient is φ = 113799168.

The previous prime is 142248949. The next prime is 142248971. The reversal of 142248965 is 569842241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569842241 = 47 ⋅12124303.

It can be written as a sum of positive squares in 2 ways, for example, as 42588676 + 99660289 = 6526^2 + 9983^2 .

It is a cyclic number.

It is not a de Polignac number, because 142248965 - 2⁴ = 142248949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14224892 + ... + 14224901.

It is an arithmetic number, because the mean of its divisors is an integer number (42674691).

Almost surely, 2^142248965 is an apocalyptic number.

It is an amenable number.

142248965 is a deficient number, since it is larger than the sum of its proper divisors (28449799).

142248965 is an equidigital number, since it uses as much as digits as its factorization.

142248965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28449798.

The product of its digits is 138240, while the sum is 41.

The square root of 142248965 is about 11926.8170523405. The cubic root of 142248965 is about 522.0150671165.

The spelling of 142248965 in words is "one hundred forty-two million, two hundred forty-eight thousand, nine hundred sixty-five".