3340821 has 16 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 1993200.

The previous prime is 3340817. The next prime is 3340837. The reversal of 3340821 is 1280433.

It is a happy number.

It is not a de Polignac number, because 3340821 - 2² = 3340817 is a prime.

It is a super-2 number, since 2×3340821² = 22322169908082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3340811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456 + ... + 2966.

It is an arithmetic number, because the mean of its divisors is an integer number (308448).

Almost surely, 2^3340821 is an apocalyptic number.

It is an amenable number.

3340821 is a deficient number, since it is larger than the sum of its proper divisors (1594347).

3340821 is a wasteful number, since it uses less digits than its factorization.

3340821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3340821 is about 1827.7912900547. The cubic root of 3340821 is about 149.4919254559.

The spelling of 3340821 in words is "three million, three hundred forty thousand, eight hundred twenty-one".