3643725 has 24 divisors (see below), whose sum is σ = 6343840. Its totient is φ = 1840320.

The previous prime is 3643721. The next prime is 3643733. The reversal of 3643725 is 5273463.

It is not a de Polignac number, because 3643725 - 2² = 3643721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3643692 and 3643701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643721) 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 23 ways as a sum of consecutive naturals, for example, 147 + ... + 2703.

Almost surely, 2^3643725 is an apocalyptic number.

It is an amenable number.

3643725 is a deficient number, since it is larger than the sum of its proper divisors (2700115).

3643725 is a wasteful number, since it uses less digits than its factorization.

3643725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2584 counting only the distinct ones).

The product of its digits is 15120, while the sum is 30.

The square root of 3643725 is about 1908.8543684629. The cubic root of 3643725 is about 153.8798889162.

The spelling of 3643725 in words is "three million, six hundred forty-three thousand, seven hundred twenty-five".