5220729 has 6 divisors (see below), whose sum is σ = 7541066. Its totient is φ = 3480480.

The previous prime is 5220689. The next prime is 5220731. The reversal of 5220729 is 9270225.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4210704 + 1010025 = 2052^2 + 1005^2 .

It is not a de Polignac number, because 5220729 - 2⁷ = 5220601 is a prime.

It is a super-2 number, since 2×5220729² = 54512022582882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5220749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 290032 + ... + 290049.

Almost surely, 2^5220729 is an apocalyptic number.

It is an amenable number.

5220729 is a deficient number, since it is larger than the sum of its proper divisors (2320337).

5220729 is a wasteful number, since it uses less digits than its factorization.

5220729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580087 (or 580084 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 5220729 is about 2284.8914635054. The cubic root of 5220729 is about 173.4777244418.

The spelling of 5220729 in words is "five million, two hundred twenty thousand, seven hundred twenty-nine".