145161999 has 12 divisors (see below), whose sum is σ = 212808856. Its totient is φ = 95329872.

The previous prime is 145161967. The next prime is 145162001. The reversal of 145161999 is 999161541.

145161999 is a `hidden beast` number, since 1 + 451 + 6 + 199 + 9 = 666.

It is not a de Polignac number, because 145161999 - 2⁵ = 145161967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145161959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119764 + ... + 120969.

Almost surely, 2^145161999 is an apocalyptic number.

145161999 is a deficient number, since it is larger than the sum of its proper divisors (67646857).

145161999 is a wasteful number, since it uses less digits than its factorization.

145161999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240806 (or 240803 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 145161999 is about 12048.3193433773. The cubic root of 145161999 is about 525.5543640833.

The spelling of 145161999 in words is "one hundred forty-five million, one hundred sixty-one thousand, nine hundred ninety-nine".