142744123 has 4 divisors (see below), whose sum is σ = 145781280. Its totient is φ = 139706968.

The previous prime is 142744117. The next prime is 142744139. The reversal of 142744123 is 321447241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142744123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142744091 and 142744100.

It is not an unprimeable number, because it can be changed into a prime (142744193) 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, 1518508 + ... + 1518601.

It is an arithmetic number, because the mean of its divisors is an integer number (36445320).

Almost surely, 2^142744123 is an apocalyptic number.

142744123 is a deficient number, since it is larger than the sum of its proper divisors (3037157).

142744123 is an equidigital number, since it uses as much as digits as its factorization.

142744123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037156.

The product of its digits is 5376, while the sum is 28.

The square root of 142744123 is about 11947.5571980217. The cubic root of 142744123 is about 522.6200641342.

The spelling of 142744123 in words is "one hundred forty-two million, seven hundred forty-four thousand, one hundred twenty-three".