145224452 has 24 divisors (see below), whose sum is σ = 259977816. Its totient is φ = 70956288.

The previous prime is 145224439. The next prime is 145224463. The reversal of 145224452 is 254422541.

It can be written as a sum of positive squares in 4 ways, for example, as 28238596 + 116985856 = 5314^2 + 10816^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57488 + ... + 59960.

It is an arithmetic number, because the mean of its divisors is an integer number (10832409).

Almost surely, 2^145224452 is an apocalyptic number.

It is an amenable number.

145224452 is a deficient number, since it is larger than the sum of its proper divisors (114753364).

145224452 is a wasteful number, since it uses less digits than its factorization.

145224452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2805 counting only the distinct ones).

The product of its digits is 12800, while the sum is 29.

The square root of 145224452 is about 12050.9108369451. The cubic root of 145224452 is about 525.6297229719.

Adding to 145224452 its reverse (254422541), we get a palindrome (399646993).

The spelling of 145224452 in words is "one hundred forty-five million, two hundred twenty-four thousand, four hundred fifty-two".