142499923 has 2 divisors, whose sum is σ = 142499924. Its totient is φ = 142499922.

The previous prime is 142499921. The next prime is 142499953. The reversal of 142499923 is 329994241.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (329994241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142499923 - 2¹ = 142499921 is a prime.

Together with 142499921, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 142499923.

It is not a weakly prime, because it can be changed into another prime (142499921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71249961 + 71249962.

It is an arithmetic number, because the mean of its divisors is an integer number (71249962).

Almost surely, 2^142499923 is an apocalyptic number.

142499923 is a deficient number, since it is larger than the sum of its proper divisors (1).

142499923 is an equidigital number, since it uses as much as digits as its factorization.

142499923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 142499923 is about 11937.3331611378. Note that the first 3 decimals coincide. The cubic root of 142499923 is about 522.3218693321.

The spelling of 142499923 in words is "one hundred forty-two million, four hundred ninety-nine thousand, nine hundred twenty-three".