252145225 has 12 divisors (see below), whose sum is σ = 314253324. Its totient is φ = 200688320.

The previous prime is 252145193. The next prime is 252145237. The reversal of 252145225 is 522541252.

It can be written as a sum of positive squares in 6 ways, for example, as 63027721 + 189117504 = 7939^2 + 13752^2 .

It is not a de Polignac number, because 252145225 - 2⁵ = 252145193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252145193 and 252145202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20674 + ... + 30523.

It is an arithmetic number, because the mean of its divisors is an integer number (26187777).

Almost surely, 2^252145225 is an apocalyptic number.

252145225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

252145225 is a deficient number, since it is larger than the sum of its proper divisors (62108099).

252145225 is a wasteful number, since it uses less digits than its factorization.

252145225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51404 (or 51399 counting only the distinct ones).

The product of its digits is 8000, while the sum is 28.

The square root of 252145225 is about 15879.0813651168. The cubic root of 252145225 is about 631.7572715606.

Adding to 252145225 its reverse (522541252), we get a palindrome (774686477).

The spelling of 252145225 in words is "two hundred fifty-two million, one hundred forty-five thousand, two hundred twenty-five".