4021491605 has 8 divisors (see below), whose sum is σ = 4828501152. Its totient is φ = 3215385808.

The previous prime is 4021491587. The next prime is 4021491641. The reversal of 4021491605 is 5061941204.

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 4021491605 - 2¹⁶ = 4021426069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216107 + ... + 233976.

It is an arithmetic number, because the mean of its divisors is an integer number (603562644).

Almost surely, 2^4021491605 is an apocalyptic number.

It is an amenable number.

4021491605 is a deficient number, since it is larger than the sum of its proper divisors (807009547).

4021491605 is a wasteful number, since it uses less digits than its factorization.

4021491605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451875.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 4021491605 is about 63415.2316482405. The cubic root of 4021491605 is about 1590.2389584555.

The spelling of 4021491605 in words is "four billion, twenty-one million, four hundred ninety-one thousand, six hundred five".