142505123 has 2 divisors, whose sum is σ = 142505124. Its totient is φ = 142505122.

The previous prime is 142505113. The next prime is 142505147. The reversal of 142505123 is 321505241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142505123 - 2⁶ = 142505059 is a prime.

It is not a weakly prime, because it can be changed into another prime (142505113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71252561 + 71252562.

It is an arithmetic number, because the mean of its divisors is an integer number (71252562).

Almost surely, 2^142505123 is an apocalyptic number.

142505123 is a deficient number, since it is larger than the sum of its proper divisors (1).

142505123 is an equidigital number, since it uses as much as digits as its factorization.

142505123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 142505123 is about 11937.5509632420. The cubic root of 142505123 is about 522.3282226471.

The spelling of 142505123 in words is "one hundred forty-two million, five hundred five thousand, one hundred twenty-three".