3618021 has 12 divisors (see below), whose sum is σ = 5302976. Its totient is φ = 2192520.

The previous prime is 3618007. The next prime is 3618029. The reversal of 3618021 is 1208163.

It is not a de Polignac number, because 3618021 - 2⁵ = 3617989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3618029) 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 11 ways as a sum of consecutive naturals, for example, 4621 + ... + 5346.

Almost surely, 2^3618021 is an apocalyptic number.

It is an amenable number.

3618021 is a deficient number, since it is larger than the sum of its proper divisors (1684955).

3618021 is a wasteful number, since it uses less digits than its factorization.

3618021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9992 (or 9981 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3618021 is about 1902.1096182923. The cubic root of 3618021 is about 153.5171954268.

The spelling of 3618021 in words is "three million, six hundred eighteen thousand, twenty-one".