2129285 has 4 divisors (see below), whose sum is σ = 2555148. Its totient is φ = 1703424.

The previous prime is 2129279. The next prime is 2129291. The reversal of 2129285 is 5829212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2129279) and next prime (2129291).

It can be written as a sum of positive squares in 2 ways, for example, as 1117249 + 1012036 = 1057^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129285 - 2⁶ = 2129221 is a prime.

It is a super-2 number, since 2×2129285² = 9067709222450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212924 + ... + 212933.

It is an arithmetic number, because the mean of its divisors is an integer number (638787).

2^2129285 is an apocalyptic number.

It is an amenable number.

2129285 is a deficient number, since it is larger than the sum of its proper divisors (425863).

2129285 is an equidigital number, since it uses as much as digits as its factorization.

2129285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425862.

The product of its digits is 2880, while the sum is 29.

The square root of 2129285 is about 1459.2069764088. The cubic root of 2129285 is about 128.6504367417.

The spelling of 2129285 in words is "two million, one hundred twenty-nine thousand, two hundred eighty-five".