225670121 has 8 divisors (see below), whose sum is σ = 239076360. Its totient is φ = 212278528.

The previous prime is 225670117. The next prime is 225670127. The reversal of 225670121 is 121076522.

It can be written as a sum of positive squares in 4 ways, for example, as 162690025 + 62980096 = 12755^2 + 7936^2 .

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 225670121 - 2² = 225670117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225670127) 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, 55655 + ... + 59571.

It is an arithmetic number, because the mean of its divisors is an integer number (29884545).

Almost surely, 2^225670121 is an apocalyptic number.

It is an amenable number.

225670121 is a deficient number, since it is larger than the sum of its proper divisors (13406239).

225670121 is a wasteful number, since it uses less digits than its factorization.

225670121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7323.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 225670121 is about 15022.3207594566. The cubic root of 225670121 is about 608.8234249817.

The spelling of 225670121 in words is "two hundred twenty-five million, six hundred seventy thousand, one hundred twenty-one".