145530305 has 8 divisors (see below), whose sum is σ = 175911912. Its totient is φ = 115573888.

The previous prime is 145530271. The next prime is 145530311. The reversal of 145530305 is 503035541.

It can be written as a sum of positive squares in 4 ways, for example, as 22963264 + 122567041 = 4792^2 + 11071^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145530305 - 2¹⁰ = 145529281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 105542 + ... + 106911.

It is an arithmetic number, because the mean of its divisors is an integer number (21988989).

Almost surely, 2^145530305 is an apocalyptic number.

It is an amenable number.

145530305 is a deficient number, since it is larger than the sum of its proper divisors (30381607).

145530305 is a wasteful number, since it uses less digits than its factorization.

145530305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212595.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 145530305 is about 12063.5941990768. The cubic root of 145530305 is about 525.9984687219.

Adding to 145530305 its reverse (503035541), we get a palindrome (648565846).

The spelling of 145530305 in words is "one hundred forty-five million, five hundred thirty thousand, three hundred five".