145641305 has 4 divisors (see below), whose sum is σ = 174769572. Its totient is φ = 116513040.

The previous prime is 145641283. The next prime is 145641311. The reversal of 145641305 is 503146541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503146541 = 71 ⋅7086571.

It can be written as a sum of positive squares in 2 ways, for example, as 72726784 + 72914521 = 8528^2 + 8539^2 .

It is not a de Polignac number, because 145641305 - 2¹² = 145637209 is a prime.

It is a super-2 number, since 2×145641305² = 42422779444206050, which contains 22 as substring.

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, 14564126 + ... + 14564135.

It is an arithmetic number, because the mean of its divisors is an integer number (43692393).

Almost surely, 2^145641305 is an apocalyptic number.

It is an amenable number.

145641305 is a deficient number, since it is larger than the sum of its proper divisors (29128267).

145641305 is an equidigital number, since it uses as much as digits as its factorization.

145641305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29128266.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 145641305 is about 12068.1939410999. The cubic root of 145641305 is about 526.1321659431.

Adding to 145641305 its reverse (503146541), we get a palindrome (648787846).

The spelling of 145641305 in words is "one hundred forty-five million, six hundred forty-one thousand, three hundred five".