145225453 has 4 divisors (see below), whose sum is σ = 146510748. Its totient is φ = 143940160.

The previous prime is 145225439. The next prime is 145225541. The reversal of 145225453 is 354522541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 74615044 = 8403^2 + 8638^2 .

It is a cyclic number.

It is not a de Polignac number, because 145225453 - 2¹⁷ = 145094381 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145225433) 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, 642478 + ... + 642703.

It is an arithmetic number, because the mean of its divisors is an integer number (36627687).

Almost surely, 2^145225453 is an apocalyptic number.

It is an amenable number.

145225453 is a deficient number, since it is larger than the sum of its proper divisors (1285295).

145225453 is a wasteful number, since it uses less digits than its factorization.

145225453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285294.

The product of its digits is 24000, while the sum is 31.

The square root of 145225453 is about 12050.9523690039. The cubic root of 145225453 is about 525.6309306523.

Adding to 145225453 its reverse (354522541), we get a palindrome (499747994).

The spelling of 145225453 in words is "one hundred forty-five million, two hundred twenty-five thousand, four hundred fifty-three".