145201225 has 12 divisors (see below), whose sum is σ = 193899916. Its totient is φ = 107225280.

The previous prime is 145201193. The next prime is 145201229. The reversal of 145201225 is 522102541.

It can be written as a sum of positive squares in 6 ways, for example, as 43917129 + 101284096 = 6627^2 + 10064^2 .

It is not a de Polignac number, because 145201225 - 2⁵ = 145201193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145201196 and 145201205.

It is not an unprimeable number, because it can be changed into a prime (145201229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223062 + ... + 223711.

Almost surely, 2^145201225 is an apocalyptic number.

It is an amenable number.

145201225 is a deficient number, since it is larger than the sum of its proper divisors (48698691).

145201225 is a wasteful number, since it uses less digits than its factorization.

145201225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446796 (or 446791 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145201225 is about 12049.9470953195. The cubic root of 145201225 is about 525.6016986451.

Adding to 145201225 its reverse (522102541), we get a palindrome (667303766).

The spelling of 145201225 in words is "one hundred forty-five million, two hundred one thousand, two hundred twenty-five".