2225129 has 4 divisors (see below), whose sum is σ = 2228880. Its totient is φ = 2221380.

The previous prime is 2225123. The next prime is 2225159. The reversal of 2225129 is 9215222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9215222 = 2 ⋅4607611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2225129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2225123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (557220).

2^2225129 is an apocalyptic number.

It is an amenable number.

2225129 is a deficient number, since it is larger than the sum of its proper divisors (3751).

2225129 is an equidigital number, since it uses as much as digits as its factorization.

2225129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750.

The product of its digits is 720, while the sum is 23.

The square root of 2225129 is about 1491.6866292891. The cubic root of 2225129 is about 130.5524614997.

The spelling of 2225129 in words is "two million, two hundred twenty-five thousand, one hundred twenty-nine".