3821121 has 16 divisors (see below), whose sum is σ = 5723200. Its totient is φ = 2519424.

The previous prime is 3821119. The next prime is 3821123. The reversal of 3821121 is 1211283.

It is an interprime number because it is at equal distance from previous prime (3821119) and next prime (3821123).

It is not a de Polignac number, because 3821121 - 2¹ = 3821119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3821094 and 3821103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821123) 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, 1890 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (357700).

Almost surely, 2^3821121 is an apocalyptic number.

It is an amenable number.

3821121 is a deficient number, since it is larger than the sum of its proper divisors (1902079).

3821121 is a wasteful number, since it uses less digits than its factorization.

3821121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1559 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 3821121 is about 1954.7687842811. The cubic root of 3821121 is about 156.3376562024.

The spelling of 3821121 in words is "three million, eight hundred twenty-one thousand, one hundred twenty-one".