6131605 has 4 divisors (see below), whose sum is σ = 7357932. Its totient is φ = 4905280.

The previous prime is 6131597. The next prime is 6131621. The reversal of 6131605 is 5061316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 4218916 = 1383^2 + 2054^2 .

It is not a de Polignac number, because 6131605 - 2³ = 6131597 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

6131605 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 3 ways as a sum of consecutive naturals, for example, 613156 + ... + 613165.

It is an arithmetic number, because the mean of its divisors is an integer number (1839483).

Almost surely, 2^6131605 is an apocalyptic number.

It is an amenable number.

6131605 is a deficient number, since it is larger than the sum of its proper divisors (1226327).

6131605 is a wasteful number, since it uses less digits than its factorization.

6131605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226326.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 6131605 is about 2476.2077861117. The cubic root of 6131605 is about 183.0310298045.

The spelling of 6131605 in words is "six million, one hundred thirty-one thousand, six hundred five".