722945 has 4 divisors (see below), whose sum is σ = 867540. Its totient is φ = 578352.

The previous prime is 722933. The next prime is 722963. The reversal of 722945 is 549227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 543169 = 424^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 722945 - 2⁶ = 722881 is a prime.

It is a d-powerful number, because it can be written as 7⁶ + 2 + 9⁶ + 2¹³ + 4⁸ + 5³ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72290 + ... + 72299.

It is an arithmetic number, because the mean of its divisors is an integer number (216885).

It is a Proth number, since it is equal to 353 ⋅ 2¹¹ + 1 and 353 < 2¹¹.

2⁷²²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

722945 is a deficient number, since it is larger than the sum of its proper divisors (144595).

722945 is a wasteful number, since it uses less digits than its factorization.

722945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144594.

The product of its digits is 5040, while the sum is 29.

The square root of 722945 is about 850.2617244120. The cubic root of 722945 is about 89.7501299647.

The spelling of 722945 in words is "seven hundred twenty-two thousand, nine hundred forty-five".