142734857 has 4 divisors (see below), whose sum is σ = 144865296. Its totient is φ = 140604420.

The previous prime is 142734853. The next prime is 142734869. The reversal of 142734857 is 758437241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 758437241 = 181 ⋅4190261.

It is a cyclic number.

It is not a de Polignac number, because 142734857 - 2² = 142734853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142734853) by changing a digit.

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, 1065119 + ... + 1065252.

It is an arithmetic number, because the mean of its divisors is an integer number (36216324).

Almost surely, 2^142734857 is an apocalyptic number.

It is an amenable number.

142734857 is a deficient number, since it is larger than the sum of its proper divisors (2130439).

142734857 is an equidigital number, since it uses as much as digits as its factorization.

142734857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130438.

The product of its digits is 188160, while the sum is 41.

The square root of 142734857 is about 11947.1694137147. The cubic root of 142734857 is about 522.6087555489.

The spelling of 142734857 in words is "one hundred forty-two million, seven hundred thirty-four thousand, eight hundred fifty-seven".