142773247 has 4 divisors (see below), whose sum is σ = 143046760. Its totient is φ = 142499736.

The previous prime is 142773229. The next prime is 142773251. The reversal of 142773247 is 742377241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142773247 - 2¹¹ = 142771199 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 (142773227) 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, 135972 + ... + 137017.

It is an arithmetic number, because the mean of its divisors is an integer number (35761690).

Almost surely, 2^142773247 is an apocalyptic number.

142773247 is a deficient number, since it is larger than the sum of its proper divisors (273513).

142773247 is an equidigital number, since it uses as much as digits as its factorization.

142773247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273512.

The product of its digits is 65856, while the sum is 37.

The square root of 142773247 is about 11948.7759624156. The cubic root of 142773247 is about 522.6556050060.

The spelling of 142773247 in words is "one hundred forty-two million, seven hundred seventy-three thousand, two hundred forty-seven".