5399721 has 12 divisors (see below), whose sum is σ = 7821060. Its totient is φ = 3589920.

The previous prime is 5399711. The next prime is 5399747. The reversal of 5399721 is 1279935.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 4562496 = 915^2 + 2136^2 .

It is not a de Polignac number, because 5399721 - 2⁷ = 5399593 is a prime.

5399721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5399711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4315 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (651755).

Almost surely, 2^5399721 is an apocalyptic number.

It is an amenable number.

5399721 is a deficient number, since it is larger than the sum of its proper divisors (2421339).

5399721 is a wasteful number, since it uses less digits than its factorization.

5399721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1653 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 5399721 is about 2323.7299757072. The cubic root of 5399721 is about 175.4380427557.

The spelling of 5399721 in words is "five million, three hundred ninety-nine thousand, seven hundred twenty-one".