145225424 has 40 divisors (see below), whose sum is σ = 299534400. Its totient is φ = 67972608.

The previous prime is 145225391. The next prime is 145225433. The reversal of 145225424 is 424522541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52787 + ... + 55469.

It is an arithmetic number, because the mean of its divisors is an integer number (7488360).

Almost surely, 2^145225424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145225424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149767200).

145225424 is an abundant number, since it is smaller than the sum of its proper divisors (154308976).

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

145225424 is a wasteful number, since it uses less digits than its factorization.

145225424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 2901 counting only the distinct ones).

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

The square root of 145225424 is about 12050.9511657794. The cubic root of 145225424 is about 525.6308956646.

Adding to 145225424 its reverse (424522541), we get a palindrome (569747965).

The spelling of 145225424 in words is "one hundred forty-five million, two hundred twenty-five thousand, four hundred twenty-four".