4006641 has 16 divisors (see below), whose sum is σ = 5515776. Its totient is φ = 2585856.

The previous prime is 4006637. The next prime is 4006649. The reversal of 4006641 is 1466004.

It is not a de Polignac number, because 4006641 - 2² = 4006637 is a prime.

4006641 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006649) 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, 17856 + ... + 18078.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

Almost surely, 2^4006641 is an apocalyptic number.

It is an amenable number.

4006641 is a deficient number, since it is larger than the sum of its proper divisors (1509135).

4006641 is a wasteful number, since it uses less digits than its factorization.

4006641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4006641 is about 2001.6595614639. The cubic root of 4006641 is about 158.8279060442.

The spelling of 4006641 in words is "four million, six thousand, six hundred forty-one".