722601 has 20 divisors (see below), whose sum is σ = 1179024. Its totient is φ = 437400.

The previous prime is 722599. The next prime is 722611. The reversal of 722601 is 106227.

Added to its reverse (106227) it gives a triangular number (828828 = T₁₂₈₇).

It is a happy number.

It is not a de Polignac number, because 722601 - 2¹ = 722599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 486 + ... + 1296.

2⁷²²⁶⁰¹ is an apocalyptic number.

It is an amenable number.

722601 is a deficient number, since it is larger than the sum of its proper divisors (456423).

722601 is a wasteful number, since it uses less digits than its factorization.

722601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 722601 is about 850.0594096885. The cubic root of 722601 is about 89.7358923934.

Adding to 722601 its reverse (106227), we get a palindrome (828828).

The spelling of 722601 in words is "seven hundred twenty-two thousand, six hundred one".