225129 has 8 divisors (see below), whose sum is σ = 303552. Its totient is φ = 148400.

The previous prime is 225119. The next prime is 225133. The reversal of 225129 is 921522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225129 - 2⁹ = 224617 is a prime.

It is a Curzon number.

225129 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (37944).

2²²⁵¹²⁹ is an apocalyptic number.

It is an amenable number.

225129 is a deficient number, since it is larger than the sum of its proper divisors (78423).

225129 is a wasteful number, since it uses less digits than its factorization.

225129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its digits is 360, while the sum is 21.

The square root of 225129 is about 474.4776074801. The cubic root of 225129 is about 60.8336414988.

It can be divided in two parts, 22 and 5129, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 225129 in words is "two hundred twenty-five thousand, one hundred twenty-nine".