3825921 has 16 divisors (see below), whose sum is σ = 5603328. Its totient is φ = 2302800.

The previous prime is 3825919. The next prime is 3825923. The reversal of 3825921 is 1295283.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3825919) and next prime (3825923).

It is not a de Polignac number, because 3825921 - 2¹ = 3825919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3825923) 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, 6000 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (350208).

Almost surely, 2^3825921 is an apocalyptic number.

It is an amenable number.

3825921 is a deficient number, since it is larger than the sum of its proper divisors (1777407).

3825921 is a wasteful number, since it uses less digits than its factorization.

3825921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its digits is 4320, while the sum is 30.

The square root of 3825921 is about 1955.9961656404. The cubic root of 3825921 is about 156.4030913411.

The spelling of 3825921 in words is "three million, eight hundred twenty-five thousand, nine hundred twenty-one".