3421656 has 128 divisors (see below), whose sum is σ = 11366400. Its totient is φ = 933120.

The previous prime is 3421637. The next prime is 3421657. The reversal of 3421656 is 6561243.

3421656 is a `hidden beast` number, since 3 + 4 + 2 + 1 + 656 = 666.

3421656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421657) 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 31 ways as a sum of consecutive naturals, for example, 46836 + ... + 46908.

It is an arithmetic number, because the mean of its divisors is an integer number (88800).

Almost surely, 2^3421656 is an apocalyptic number.

3421656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3421656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5683200).

3421656 is an abundant number, since it is smaller than the sum of its proper divisors (7944744).

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

3421656 is a wasteful number, since it uses less digits than its factorization.

3421656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 116 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 3421656 is about 1849.7718778271. The cubic root of 3421656 is about 150.6880391884.

Adding to 3421656 its reverse (6561243), we get a palindrome (9982899).

The spelling of 3421656 in words is "three million, four hundred twenty-one thousand, six hundred fifty-six".