4891605 has 16 divisors (see below), whose sum is σ = 7922880. Its totient is φ = 2576768.

The previous prime is 4891591. The next prime is 4891639. The reversal of 4891605 is 5061984.

It is a cyclic number.

It is not a de Polignac number, because 4891605 - 2⁷ = 4891477 is a prime.

4891605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 3209.

It is an arithmetic number, because the mean of its divisors is an integer number (495180).

Almost surely, 2^4891605 is an apocalyptic number.

It is an amenable number.

4891605 is a deficient number, since it is larger than the sum of its proper divisors (3031275).

4891605 is a wasteful number, since it uses less digits than its factorization.

4891605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 4891605 is about 2211.6973120208. The cubic root of 4891605 is about 169.7528704482.

The spelling of 4891605 in words is "four million, eight hundred ninety-one thousand, six hundred five".