722145 has 16 divisors (see below), whose sum is σ = 1193472. Its totient is φ = 372480.

The previous prime is 722123. The next prime is 722147. The reversal of 722145 is 541227.

It is not a de Polignac number, because 722145 - 2¹² = 718049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722147) 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, 312 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (74592).

2⁷²²¹⁴⁵ is an apocalyptic number.

It is an amenable number.

722145 is a deficient number, since it is larger than the sum of its proper divisors (471327).

722145 is a wasteful number, since it uses less digits than its factorization.

722145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592.

The product of its digits is 560, while the sum is 21.

The square root of 722145 is about 849.7911508130. The cubic root of 722145 is about 89.7170123672.

The spelling of 722145 in words is "seven hundred twenty-two thousand, one hundred forty-five".