142757247 has 4 divisors (see below), whose sum is σ = 190343000. Its totient is φ = 95171496.

The previous prime is 142757233. The next prime is 142757257. The reversal of 142757247 is 742757241.

142757247 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.

It is not a de Polignac number, because 142757247 - 2⁴ = 142757231 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 (142757207) 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, 23792872 + ... + 23792877.

It is an arithmetic number, because the mean of its divisors is an integer number (47585750).

Almost surely, 2^142757247 is an apocalyptic number.

142757247 is a deficient number, since it is larger than the sum of its proper divisors (47585753).

142757247 is an equidigital number, since it uses as much as digits as its factorization.

142757247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47585752.

The product of its digits is 109760, while the sum is 39.

The square root of 142757247 is about 11948.1064190105. The cubic root of 142757247 is about 522.6360803348.

The spelling of 142757247 in words is "one hundred forty-two million, seven hundred fifty-seven thousand, two hundred forty-seven".