722045 has 4 divisors (see below), whose sum is σ = 866460. Its totient is φ = 577632.

The previous prime is 722027. The next prime is 722047. The reversal of 722045 is 540227.

722045 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: 540227 = 19 ⋅28433.

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 148996 = 757^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722047) 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, 72200 + ... + 72209.

It is an arithmetic number, because the mean of its divisors is an integer number (216615).

2⁷²²⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

722045 is a deficient number, since it is larger than the sum of its proper divisors (144415).

722045 is a wasteful number, since it uses less digits than its factorization.

722045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144414.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 722045 is about 849.7323107897. The cubic root of 722045 is about 89.7128709480.

It can be divided in two parts, 7220 and 45, that multiplied together give a square (324900 = 570²).

The spelling of 722045 in words is "seven hundred twenty-two thousand, forty-five".