3653021 has 8 divisors (see below), whose sum is σ = 3867264. Its totient is φ = 3443440.

The previous prime is 3652991. The next prime is 3653029. The reversal of 3653021 is 1203563.

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

It is a cyclic number.

It is not a de Polignac number, because 3653021 - 2¹⁰ = 3651997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3652984 and 3653002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3653029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (483408).

Almost surely, 2^3653021 is an apocalyptic number.

It is an amenable number.

3653021 is a deficient number, since it is larger than the sum of its proper divisors (214243).

3653021 is a wasteful number, since it uses less digits than its factorization.

3653021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 3653021 is about 1911.2877857612. The cubic root of 3653021 is about 154.0106390581.

Adding to 3653021 its reverse (1203563), we get a palindrome (4856584).

The spelling of 3653021 in words is "three million, six hundred fifty-three thousand, twenty-one".