722517 has 16 divisors (see below), whose sum is σ = 1055232. Its totient is φ = 437760.

The previous prime is 722509. The next prime is 722521. The reversal of 722517 is 715227.

It is not a de Polignac number, because 722517 - 2³ = 722509 is a prime.

722517 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (65952).

2⁷²²⁵¹⁷ is an apocalyptic number.

It is an amenable number.

722517 is a deficient number, since it is larger than the sum of its proper divisors (332715).

722517 is a wasteful number, since it uses less digits than its factorization.

722517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its digits is 980, while the sum is 24.

The square root of 722517 is about 850.0099999412. The cubic root of 722517 is about 89.7324150907.

The spelling of 722517 in words is "seven hundred twenty-two thousand, five hundred seventeen".