2821429 has 4 divisors (see below), whose sum is σ = 3038476. Its totient is φ = 2604384.

The previous prime is 2821421. The next prime is 2821451. The reversal of 2821429 is 9241282.

2821429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 255025 + 2566404 = 505^2 + 1602^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821429 - 2³ = 2821421 is a prime.

It is a Duffinian number.

2821429 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2821397 and 2821406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108504 + ... + 108529.

It is an arithmetic number, because the mean of its divisors is an integer number (759619).

2^2821429 is an apocalyptic number.

It is an amenable number.

2821429 is a deficient number, since it is larger than the sum of its proper divisors (217047).

2821429 is a wasteful number, since it uses less digits than its factorization.

2821429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217046.

The product of its digits is 2304, while the sum is 28.

The square root of 2821429 is about 1679.7109870451. The cubic root of 2821429 is about 141.3046244989.

Subtracting from 2821429 its product of digits (2304), we obtain a triangular number (2819125 = T₂₃₇₄).

It can be divided in two parts, 282 and 1429, that added together give a triangular number (1711 = T₅₈).

The spelling of 2821429 in words is "two million, eight hundred twenty-one thousand, four hundred twenty-nine".