4002621 has 16 divisors (see below), whose sum is σ = 6365184. Its totient is φ = 2187504.

The previous prime is 4002611. The next prime is 4002631. The reversal of 4002621 is 1262004.

It is an interprime number because it is at equal distance from previous prime (4002611) and next prime (4002631).

It is not a de Polignac number, because 4002621 - 2⁹ = 4002109 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002611) 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 15 ways as a sum of consecutive naturals, for example, 3661 + ... + 4626.

It is an arithmetic number, because the mean of its divisors is an integer number (397824).

Almost surely, 2^4002621 is an apocalyptic number.

It is an amenable number.

4002621 is a deficient number, since it is larger than the sum of its proper divisors (2362563).

4002621 is a wasteful number, since it uses less digits than its factorization.

4002621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 4002621 is about 2000.6551426970. The cubic root of 4002621 is about 158.7747691114.

Adding to 4002621 its reverse (1262004), we get a palindrome (5264625).

The spelling of 4002621 in words is "four million, two thousand, six hundred twenty-one".