142288693 has 4 divisors (see below), whose sum is σ = 145316160. Its totient is φ = 139261228.

The previous prime is 142288687. The next prime is 142288723. The reversal of 142288693 is 396882241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142288693 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 (142288613) 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, 1513663 + ... + 1513756.

It is an arithmetic number, because the mean of its divisors is an integer number (36329040).

Almost surely, 2^142288693 is an apocalyptic number.

It is an amenable number.

142288693 is a deficient number, since it is larger than the sum of its proper divisors (3027467).

142288693 is an equidigital number, since it uses as much as digits as its factorization.

142288693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027466.

The product of its digits is 165888, while the sum is 43.

The square root of 142288693 is about 11928.4824265285. The cubic root of 142288693 is about 522.0636595830.

The spelling of 142288693 in words is "one hundred forty-two million, two hundred eighty-eight thousand, six hundred ninety-three".