4002645 has 16 divisors (see below), whose sum is σ = 6431040. Its totient is φ = 2125824.

The previous prime is 4002643. The next prime is 4002671. The reversal of 4002645 is 5462004.

It is a happy number.

It is not a de Polignac number, because 4002645 - 2¹ = 4002643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4821 + ... + 5589.

It is an arithmetic number, because the mean of its divisors is an integer number (401940).

Almost surely, 2^4002645 is an apocalyptic number.

It is an amenable number.

4002645 is a deficient number, since it is larger than the sum of its proper divisors (2428395).

4002645 is a wasteful number, since it uses less digits than its factorization.

4002645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4002645 is about 2000.6611407232. The cubic root of 4002645 is about 158.7750864524.

Adding to 4002645 its reverse (5462004), we get a palindrome (9464649).

The spelling of 4002645 in words is "four million, two thousand, six hundred forty-five".