5171861 has 4 divisors (see below), whose sum is σ = 5177472. Its totient is φ = 5166252.

The previous prime is 5171843. The next prime is 5171891. The reversal of 5171861 is 1681715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5171861 - 2¹⁸ = 4909717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5171801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061 + ... + 3386.

It is an arithmetic number, because the mean of its divisors is an integer number (1294368).

Almost surely, 2^5171861 is an apocalyptic number.

It is an amenable number.

5171861 is a deficient number, since it is larger than the sum of its proper divisors (5611).

5171861 is a wasteful number, since it uses less digits than its factorization.

5171861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610.

The product of its digits is 1680, while the sum is 29.

The square root of 5171861 is about 2274.1725967921. The cubic root of 5171861 is about 172.9347543731.

The spelling of 5171861 in words is "five million, one hundred seventy-one thousand, eight hundred sixty-one".