3825681 has 4 divisors (see below), whose sum is σ = 5100912. Its totient is φ = 2550452.

The previous prime is 3825677. The next prime is 3825683. The reversal of 3825681 is 1865283.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3825681 - 2² = 3825677 is a prime.

It is a super-2 number, since 2×3825681² = 29271670227522, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3825683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637611 + ... + 637616.

It is an arithmetic number, because the mean of its divisors is an integer number (1275228).

Almost surely, 2^3825681 is an apocalyptic number.

It is an amenable number.

3825681 is a deficient number, since it is larger than the sum of its proper divisors (1275231).

3825681 is a wasteful number, since it uses less digits than its factorization.

3825681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275230.

The product of its digits is 11520, while the sum is 33.

The square root of 3825681 is about 1955.9348148647. The cubic root of 3825681 is about 156.3998208844.

The spelling of 3825681 in words is "three million, eight hundred twenty-five thousand, six hundred eighty-one".