3499821 has 32 divisors (see below), whose sum is σ = 5712000. Its totient is φ = 2117232.

The previous prime is 3499799. The next prime is 3499823. The reversal of 3499821 is 1289943.

It is not a de Polignac number, because 3499821 - 2⁶ = 3499757 is a prime.

3499821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3499823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59290 + ... + 59348.

It is an arithmetic number, because the mean of its divisors is an integer number (178500).

Almost surely, 2^3499821 is an apocalyptic number.

It is an amenable number.

3499821 is a deficient number, since it is larger than the sum of its proper divisors (2212179).

3499821 is an equidigital number, since it uses as much as digits as its factorization.

3499821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 75 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3499821 is about 1870.7808530130. The cubic root of 3499821 is about 151.8268602191.

The spelling of 3499821 in words is "three million, four hundred ninety-nine thousand, eight hundred twenty-one".