605106721 has 16 divisors (see below), whose sum is σ = 669047040. Its totient is φ = 544687360.

The previous prime is 605106703. The next prime is 605106787. The reversal of 605106721 is 127601506.

It is a cyclic number.

It is not a de Polignac number, because 605106721 - 2¹⁷ = 604975649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 605106721.

It is not an unprimeable number, because it can be changed into a prime (605106221) 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, 47016 + ... + 58486.

It is an arithmetic number, because the mean of its divisors is an integer number (41815440).

Almost surely, 2^605106721 is an apocalyptic number.

It is an amenable number.

605106721 is a deficient number, since it is larger than the sum of its proper divisors (63940319).

605106721 is a wasteful number, since it uses less digits than its factorization.

605106721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 605106721 is about 24598.9170696598. The cubic root of 605106721 is about 845.8187836421.

The spelling of 605106721 in words is "six hundred five million, one hundred six thousand, seven hundred twenty-one".