142242997 has 4 divisors (see below), whose sum is σ = 153184780. Its totient is φ = 131301216.

The previous prime is 142242917. The next prime is 142243019. The reversal of 142242997 is 799242241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799242241 = 7 ⋅114177463.

It can be written as a sum of positive squares in 2 ways, for example, as 82428241 + 59814756 = 9079^2 + 7734^2 .

It is a cyclic number.

It is not a de Polignac number, because 142242997 - 2¹¹ = 142240949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142242917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5470872 + ... + 5470897.

It is an arithmetic number, because the mean of its divisors is an integer number (38296195).

Almost surely, 2^142242997 is an apocalyptic number.

It is an amenable number.

142242997 is a deficient number, since it is larger than the sum of its proper divisors (10941783).

142242997 is a wasteful number, since it uses less digits than its factorization.

142242997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10941782.

The product of its digits is 72576, while the sum is 40.

The square root of 142242997 is about 11926.5668572310. The cubic root of 142242997 is about 522.0077667013.

The spelling of 142242997 in words is "one hundred forty-two million, two hundred forty-two thousand, nine hundred ninety-seven".