3421856 has 24 divisors (see below), whose sum is σ = 6851124. Its totient is φ = 1681920.

The previous prime is 3421853. The next prime is 3421861. The reversal of 3421856 is 6581243.

3421856 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 1123600 = 1516^2 + 1060^2 .

It is not an unprimeable number, because it can be changed into a prime (3421853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076 + ... + 2828.

Almost surely, 2^3421856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3421856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3425562).

3421856 is an abundant number, since it is smaller than the sum of its proper divisors (3429268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3421856 is a wasteful number, since it uses less digits than its factorization.

3421856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1816 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 3421856 is about 1849.8259377574. The cubic root of 3421856 is about 150.6909750983.

The spelling of 3421856 in words is "three million, four hundred twenty-one thousand, eight hundred fifty-six".