5191121 has 8 divisors (see below), whose sum is σ = 5622120. Its totient is φ = 4764672.

The previous prime is 5191099. The next prime is 5191129. The reversal of 5191121 is 1211915.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 5107600 = 289^2 + 2260^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5191121 - 2⁶ = 5191057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5191093 and 5191102.

It is not an unprimeable number, because it can be changed into a prime (5191129) 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 7 ways as a sum of consecutive naturals, for example, 1475 + ... + 3543.

It is an arithmetic number, because the mean of its divisors is an integer number (702765).

Almost surely, 2^5191121 is an apocalyptic number.

It is an amenable number.

5191121 is a deficient number, since it is larger than the sum of its proper divisors (430999).

5191121 is a wasteful number, since it uses less digits than its factorization.

5191121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275.

The product of its digits is 90, while the sum is 20.

The square root of 5191121 is about 2278.4031688882. The cubic root of 5191121 is about 173.1491580063.

The spelling of 5191121 in words is "five million, one hundred ninety-one thousand, one hundred twenty-one".