142742939 has 4 divisors (see below), whose sum is σ = 145436256. Its totient is φ = 140049624.

The previous prime is 142742933. The next prime is 142742983. The reversal of 142742939 is 939247241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939247241 = 499 ⋅1882259.

It is a cyclic number.

It is not a de Polignac number, because 142742939 - 2⁴ = 142742923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142742896 and 142742905.

It is not an unprimeable number, because it can be changed into a prime (142742933) 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, 1346579 + ... + 1346684.

It is an arithmetic number, because the mean of its divisors is an integer number (36359064).

Almost surely, 2^142742939 is an apocalyptic number.

142742939 is a deficient number, since it is larger than the sum of its proper divisors (2693317).

142742939 is an equidigital number, since it uses as much as digits as its factorization.

142742939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693316.

The product of its digits is 108864, while the sum is 41.

The square root of 142742939 is about 11947.5076480411. The cubic root of 142742939 is about 522.6186191620.

The spelling of 142742939 in words is "one hundred forty-two million, seven hundred forty-two thousand, nine hundred thirty-nine".