5991605 has 4 divisors (see below), whose sum is σ = 7189932. Its totient is φ = 4793280.

The previous prime is 5991589. The next prime is 5991641. The reversal of 5991605 is 5061995.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5061995 = 5 ⋅1012399.

It can be written as a sum of positive squares in 2 ways, for example, as 1739761 + 4251844 = 1319^2 + 2062^2 .

It is not a de Polignac number, because 5991605 - 2⁴ = 5991589 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 3 ways as a sum of consecutive naturals, for example, 599156 + ... + 599165.

It is an arithmetic number, because the mean of its divisors is an integer number (1797483).

Almost surely, 2^5991605 is an apocalyptic number.

It is an amenable number.

5991605 is a deficient number, since it is larger than the sum of its proper divisors (1198327).

5991605 is a wasteful number, since it uses less digits than its factorization.

5991605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198326.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 5991605 is about 2447.7755207535. The cubic root of 5991605 is about 181.6272712413.

The spelling of 5991605 in words is "five million, nine hundred ninety-one thousand, six hundred five".