722519 has 4 divisors (see below), whose sum is σ = 825744. Its totient is φ = 619296.

The previous prime is 722509. The next prime is 722521. The reversal of 722519 is 915227.

722519 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915227 = 179 ⋅5113.

It is a cyclic number.

It is not a de Polignac number, because 722519 - 2¹² = 718423 is a prime.

It is a super-2 number, since 2×722519² = 1044067410722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51602 + ... + 51615.

It is an arithmetic number, because the mean of its divisors is an integer number (206436).

2⁷²²⁵¹⁹ is an apocalyptic number.

722519 is a deficient number, since it is larger than the sum of its proper divisors (103225).

722519 is a wasteful number, since it uses less digits than its factorization.

722519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103224.

The product of its digits is 1260, while the sum is 26.

The square root of 722519 is about 850.0111763971. The cubic root of 722519 is about 89.7324978868.

The spelling of 722519 in words is "seven hundred twenty-two thousand, five hundred nineteen".