145122305 has 4 divisors (see below), whose sum is σ = 174146772. Its totient is φ = 116097840.

The previous prime is 145122287. The next prime is 145122311. The reversal of 145122305 is 503221541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503221541 = 1213 ⋅414857.

It can be written as a sum of positive squares in 2 ways, for example, as 64625521 + 80496784 = 8039^2 + 8972^2 .

It is a de Polignac number, because none of the positive numbers 2^k-145122305 is a prime.

It is a Duffinian number.

It is a Curzon 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, 14512226 + ... + 14512235.

It is an arithmetic number, because the mean of its divisors is an integer number (43536693).

Almost surely, 2^145122305 is an apocalyptic number.

It is an amenable number.

145122305 is a deficient number, since it is larger than the sum of its proper divisors (29024467).

145122305 is an equidigital number, since it uses as much as digits as its factorization.

145122305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29024466.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145122305 is about 12046.6719470566. The cubic root of 145122305 is about 525.5064560981.

Adding to 145122305 its reverse (503221541), we get a palindrome (648343846).

The spelling of 145122305 in words is "one hundred forty-five million, one hundred twenty-two thousand, three hundred five".