722507 has 4 divisors (see below), whose sum is σ = 724296. Its totient is φ = 720720.

The previous prime is 722489. The next prime is 722509. The reversal of 722507 is 705227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705227 = 59 ⋅11953.

It is a cyclic number.

It is not a de Polignac number, because 722507 - 2¹² = 718411 is a prime.

It is a Duffinian 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, 32 + ... + 1202.

It is an arithmetic number, because the mean of its divisors is an integer number (181074).

2⁷²²⁵⁰⁷ is an apocalyptic number.

722507 is a deficient number, since it is larger than the sum of its proper divisors (1789).

722507 is a wasteful number, since it uses less digits than its factorization.

722507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 722507 is about 850.0041176371. The cubic root of 722507 is about 89.7320011082.

The spelling of 722507 in words is "seven hundred twenty-two thousand, five hundred seven".