3825729 has 12 divisors (see below), whose sum is σ = 5581056. Its totient is φ = 2525112.

The previous prime is 3825721. The next prime is 3825739. The reversal of 3825729 is 9275283.

It is a happy number.

3825729 is a `hidden beast` number, since 3 + 82 + 572 + 9 = 666.

It is not a de Polignac number, because 3825729 - 2³ = 3825721 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3825693 and 3825702.

It is not an unprimeable number, because it can be changed into a prime (3825721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1137 + ... + 2990.

It is an arithmetic number, because the mean of its divisors is an integer number (465088).

Almost surely, 2^3825729 is an apocalyptic number.

It is an amenable number.

3825729 is a deficient number, since it is larger than the sum of its proper divisors (1755327).

3825729 is a wasteful number, since it uses less digits than its factorization.

3825729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236 (or 4233 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3825729 is about 1955.9470851738. The cubic root of 3825729 is about 156.4004749867.

It can be divided in two parts, 3825 and 729, that added together give a palindrome (4554).

The spelling of 3825729 in words is "three million, eight hundred twenty-five thousand, seven hundred twenty-nine".