145123899 has 8 divisors (see below), whose sum is σ = 193560912. Its totient is φ = 96718080.

The previous prime is 145123889. The next prime is 145123961. The reversal of 145123899 is 998321541.

145123899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145123899 - 2¹⁵ = 145091131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145123899.

It is not an unprimeable number, because it can be changed into a prime (145123829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7159 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (24195114).

Almost surely, 2^145123899 is an apocalyptic number.

145123899 is a deficient number, since it is larger than the sum of its proper divisors (48437013).

145123899 is a wasteful number, since it uses less digits than its factorization.

145123899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15597.

The product of its digits is 77760, while the sum is 42.

The square root of 145123899 is about 12046.7381062261. The cubic root of 145123899 is about 525.5083801171.

The spelling of 145123899 in words is "one hundred forty-five million, one hundred twenty-three thousand, eight hundred ninety-nine".