145105305 has 16 divisors (see below), whose sum is σ = 238444224. Its totient is φ = 75297600.

The previous prime is 145105291. The next prime is 145105339. The reversal of 145105305 is 503501541.

It is not a de Polignac number, because 145105305 - 2⁹ = 145104793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130171 + ... + 131280.

It is an arithmetic number, because the mean of its divisors is an integer number (14902764).

Almost surely, 2^145105305 is an apocalyptic number.

145105305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145105305 is a deficient number, since it is larger than the sum of its proper divisors (93338919).

145105305 is a wasteful number, since it uses less digits than its factorization.

145105305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261496.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 145105305 is about 12045.9663373264. The cubic root of 145105305 is about 525.4859355709.

Adding to 145105305 its reverse (503501541), we get a palindrome (648606846).

The spelling of 145105305 in words is "one hundred forty-five million, one hundred five thousand, three hundred five".