145225044 has 18 divisors (see below), whose sum is σ = 367096730. Its totient is φ = 48408336.

The previous prime is 145225021. The next prime is 145225057. The reversal of 145225044 is 440522541.

It can be written as a sum of positive squares in only one way, i.e., 143712144 + 1512900 = 11988^2 + 1230^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 145224999 and 145225017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2016979 + ... + 2017050.

Almost surely, 2^145225044 is an apocalyptic number.

It is an amenable number.

145225044 is an abundant number, since it is smaller than the sum of its proper divisors (221871686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145225044 is a wasteful number, since it uses less digits than its factorization.

145225044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034039 (or 4034034 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 145225044 is about 12050.9353993788. The cubic root of 145225044 is about 525.6304372051.

Adding to 145225044 its reverse (440522541), we get a palindrome (585747585).

The spelling of 145225044 in words is "one hundred forty-five million, two hundred twenty-five thousand, forty-four".