2220129 has 10 divisors (see below), whose sum is σ = 3316610. Its totient is φ = 1480032.

The previous prime is 2220089. The next prime is 2220151. The reversal of 2220129 is 9210222.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 893025 = 1152^2 + 945^2 .

It is not a de Polignac number, because 2220129 - 2²⁰ = 1171553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220199) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13624 + ... + 13785.

It is an arithmetic number, because the mean of its divisors is an integer number (331661).

2^2220129 is an apocalyptic number.

It is an amenable number.

2220129 is a deficient number, since it is larger than the sum of its proper divisors (1096481).

2220129 is an equidigital number, since it uses as much as digits as its factorization.

2220129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27421 (or 27412 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2220129 is about 1490.0097315118. The cubic root of 2220129 is about 130.4546017275.

The spelling of 2220129 in words is "two million, two hundred twenty thousand, one hundred twenty-nine".