5161391 has 4 divisors (see below), whose sum is σ = 5339400. Its totient is φ = 4983384.

The previous prime is 5161381. The next prime is 5161411. The reversal of 5161391 is 1931615.

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

It is a cyclic number.

It is not a de Polignac number, because 5161391 - 2⁶ = 5161327 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 5161391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161381) 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, 88961 + ... + 89018.

It is an arithmetic number, because the mean of its divisors is an integer number (1334850).

Almost surely, 2^5161391 is an apocalyptic number.

5161391 is a deficient number, since it is larger than the sum of its proper divisors (178009).

5161391 is a wasteful number, since it uses less digits than its factorization.

5161391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178008.

The product of its digits is 810, while the sum is 26.

The square root of 5161391 is about 2271.8694944913. The cubic root of 5161391 is about 172.8179782213.

The spelling of 5161391 in words is "five million, one hundred sixty-one thousand, three hundred ninety-one".