722505 has 24 divisors (see below), whose sum is σ = 1346112. Its totient is φ = 329952.

The previous prime is 722489. The next prime is 722509. The reversal of 722505 is 505227.

It is not a de Polignac number, because 722505 - 2⁴ = 722489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam 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 23 ways as a sum of consecutive naturals, for example, 244 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (56088).

2⁷²²⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

722505 is a deficient number, since it is larger than the sum of its proper divisors (623607).

722505 is a wasteful number, since it uses less digits than its factorization.

722505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 722505 is about 850.0029411714. The cubic root of 722505 is about 89.7319183112.

The spelling of 722505 in words is "seven hundred twenty-two thousand, five hundred five".