145515305 has 16 divisors (see below), whose sum is σ = 188912640. Its totient is φ = 106964928.

The previous prime is 145515289. The next prime is 145515313. The reversal of 145515305 is 503515541.

It is a cyclic number.

It is not a de Polignac number, because 145515305 - 2⁴ = 145515289 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9476 + ... + 19514.

It is an arithmetic number, because the mean of its divisors is an integer number (11807040).

Almost surely, 2^145515305 is an apocalyptic number.

It is an amenable number.

145515305 is a deficient number, since it is larger than the sum of its proper divisors (43397335).

145515305 is a wasteful number, since it uses less digits than its factorization.

145515305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10280.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 145515305 is about 12062.9724777934. The cubic root of 145515305 is about 525.9803963162.

The spelling of 145515305 in words is "one hundred forty-five million, five hundred fifteen thousand, three hundred five".