145202305 has 4 divisors (see below), whose sum is σ = 174242772. Its totient is φ = 116161840.

The previous prime is 145202273. The next prime is 145202341. The reversal of 145202305 is 503202541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503202541 = 251 ⋅2004791.

It can be written as a sum of positive squares in 2 ways, for example, as 19784704 + 125417601 = 4448^2 + 11199^2 .

It is not a de Polignac number, because 145202305 - 2⁵ = 145202273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14520226 + ... + 14520235.

It is an arithmetic number, because the mean of its divisors is an integer number (43560693).

Almost surely, 2^145202305 is an apocalyptic number.

It is an amenable number.

145202305 is a deficient number, since it is larger than the sum of its proper divisors (29040467).

145202305 is an equidigital number, since it uses as much as digits as its factorization.

145202305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29040466.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 145202305 is about 12049.9919087110. The cubic root of 145202305 is about 525.6030017756.

Adding to 145202305 its reverse (503202541), we get a palindrome (648404846).

The spelling of 145202305 in words is "one hundred forty-five million, two hundred two thousand, three hundred five".