145217169 has 12 divisors (see below), whose sum is σ = 214221696. Its totient is φ = 94751352.

The previous prime is 145217167. The next prime is 145217183. The reversal of 145217169 is 961712541.

145217169 is a `hidden beast` number, since 1 + 4 + 521 + 71 + 69 = 666.

145217169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145217169 - 2¹ = 145217167 is a prime.

It is a super-2 number, since 2×145217169² = 42176052344749122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145217161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171229 + ... + 172074.

It is an arithmetic number, because the mean of its divisors is an integer number (17851808).

Almost surely, 2^145217169 is an apocalyptic number.

It is an amenable number.

145217169 is a deficient number, since it is larger than the sum of its proper divisors (69004527).

145217169 is a wasteful number, since it uses less digits than its factorization.

145217169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343356 (or 343353 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 145217169 is about 12050.6086568273. The cubic root of 145217169 is about 525.6209360557.

The spelling of 145217169 in words is "one hundred forty-five million, two hundred seventeen thousand, one hundred sixty-nine".