3725661 has 8 divisors (see below), whose sum is σ = 4990720. Its totient is φ = 2472192.

The previous prime is 3725651. The next prime is 3725663. The reversal of 3725661 is 1665273.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3725661 - 2⁶ = 3725597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3725663) 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 7 ways as a sum of consecutive naturals, for example, 2116 + ... + 3453.

It is an arithmetic number, because the mean of its divisors is an integer number (623840).

Almost surely, 2^3725661 is an apocalyptic number.

It is an amenable number.

3725661 is a deficient number, since it is larger than the sum of its proper divisors (1265059).

3725661 is a wasteful number, since it uses less digits than its factorization.

3725661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795.

The product of its digits is 7560, while the sum is 30.

The square root of 3725661 is about 1930.1971401906. The cubic root of 3725661 is about 155.0247757829.

The spelling of 3725661 in words is "three million, seven hundred twenty-five thousand, six hundred sixty-one".