145500305 has 4 divisors (see below), whose sum is σ = 174600372. Its totient is φ = 116400240.

The previous prime is 145500301. The next prime is 145500307. The reversal of 145500305 is 503005541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503005541 = 787 ⋅639143.

It can be written as a sum of positive squares in 2 ways, for example, as 111534721 + 33965584 = 10561^2 + 5828^2 .

It is not a de Polignac number, because 145500305 - 2² = 145500301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145500301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14550026 + ... + 14550035.

It is an arithmetic number, because the mean of its divisors is an integer number (43650093).

Almost surely, 2^145500305 is an apocalyptic number.

It is an amenable number.

145500305 is a deficient number, since it is larger than the sum of its proper divisors (29100067).

145500305 is an equidigital number, since it uses as much as digits as its factorization.

145500305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29100066.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 145500305 is about 12062.3507244649. The cubic root of 145500305 is about 525.9623226686.

Adding to 145500305 its reverse (503005541), we get a palindrome (648505846).

The spelling of 145500305 in words is "one hundred forty-five million, five hundred thousand, three hundred five".