145065645 has 24 divisors (see below), whose sum is σ = 253061016. Its totient is φ = 76871808.

The previous prime is 145065643. The next prime is 145065659. The reversal of 145065645 is 546560541.

145065645 is a `hidden beast` number, since 1 + 4 + 5 + 0 + 6 + 5 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13527684 + 131537961 = 3678^2 + 11469^2 .

It is not a de Polignac number, because 145065645 - 2¹ = 145065643 is a prime.

It is a super-3 number, since 3×145065645³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145065643) 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 in 23 ways as a sum of consecutive naturals, for example, 3202 + ... + 17331.

It is an arithmetic number, because the mean of its divisors is an integer number (10544209).

Almost surely, 2^145065645 is an apocalyptic number.

145065645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145065645 is a deficient number, since it is larger than the sum of its proper divisors (107995371).

145065645 is a wasteful number, since it uses less digits than its factorization.

145065645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20701 (or 20698 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 145065645 is about 12044.3200306202. The cubic root of 145065645 is about 525.4380561562.

The spelling of 145065645 in words is "one hundred forty-five million, sixty-five thousand, six hundred forty-five".