145021305 has 128 divisors (see below), whose sum is σ = 298722816. Its totient is φ = 58982400.

The previous prime is 145021301. The next prime is 145021313. The reversal of 145021305 is 503120541.

145021305 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 145021305 - 2² = 145021301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145021301) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1495017 + ... + 1495113.

It is an arithmetic number, because the mean of its divisors is an integer number (2333772).

Almost surely, 2^145021305 is an apocalyptic number.

145021305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145021305 is an abundant number, since it is smaller than the sum of its proper divisors (153701511).

145021305 is a wasteful number, since it uses less digits than its factorization.

145021305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 145021305 is about 12042.4791882735. The cubic root of 145021305 is about 525.3845164926.

Adding to 145021305 its reverse (503120541), we get a palindrome (648141846).

The spelling of 145021305 in words is "one hundred forty-five million, twenty-one thousand, three hundred five".