5318721 has 12 divisors (see below), whose sum is σ = 7707648. Its totient is φ = 3534264.

The previous prime is 5318717. The next prime is 5318737. The reversal of 5318721 is 1278135.

It is not a de Polignac number, because 5318721 - 2² = 5318717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5318711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 4218.

It is an arithmetic number, because the mean of its divisors is an integer number (642304).

Almost surely, 2^5318721 is an apocalyptic number.

It is an amenable number.

5318721 is a deficient number, since it is larger than the sum of its proper divisors (2388927).

5318721 is a wasteful number, since it uses less digits than its factorization.

5318721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1929 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 5318721 is about 2306.2352438552. The cubic root of 5318721 is about 174.5563838889.

The spelling of 5318721 in words is "five million, three hundred eighteen thousand, seven hundred twenty-one".