5161665 has 8 divisors (see below), whose sum is σ = 8258688. Its totient is φ = 2752880.

The previous prime is 5161643. The next prime is 5161669. The reversal of 5161665 is 5661615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5161665 - 2¹¹ = 5159617 is a prime.

5161665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5161669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172041 + ... + 172070.

It is an arithmetic number, because the mean of its divisors is an integer number (1032336).

Almost surely, 2^5161665 is an apocalyptic number.

It is an amenable number.

5161665 is a deficient number, since it is larger than the sum of its proper divisors (3097023).

5161665 is a wasteful number, since it uses less digits than its factorization.

5161665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344119.

The product of its digits is 5400, while the sum is 30.

The square root of 5161665 is about 2271.9297964506. The cubic root of 5161665 is about 172.8210362657.

It can be divided in two parts, 51616 and 65, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 5161665 in words is "five million, one hundred sixty-one thousand, six hundred sixty-five".