145999123 has 2 divisors, whose sum is σ = 145999124. Its totient is φ = 145999122.

The previous prime is 145999121. The next prime is 145999157. The reversal of 145999123 is 321999541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145999123 - 2¹ = 145999121 is a prime.

Together with 145999121, 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 145999123.

It is not a weakly prime, because it can be changed into another prime (145999121) 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, 72999561 + 72999562.

It is an arithmetic number, because the mean of its divisors is an integer number (72999562).

Almost surely, 2^145999123 is an apocalyptic number.

145999123 is a deficient number, since it is larger than the sum of its proper divisors (1).

145999123 is an equidigital number, since it uses as much as digits as its factorization.

145999123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 145999123 is about 12083.0096830219. The cubic root of 145999123 is about 526.5626884853.

The spelling of 145999123 in words is "one hundred forty-five million, nine hundred ninety-nine thousand, one hundred twenty-three".