722312 has 8 divisors (see below), whose sum is σ = 1354350. Its totient is φ = 361152.

The previous prime is 722311. The next prime is 722317. The reversal of 722312 is 213227.

722312 = 5⁴ + 6⁴ + ... + 20⁴.

It can be written as a sum of positive squares in only one way, i.e., 401956 + 320356 = 634^2 + 566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (722311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45137 + ... + 45152.

2⁷²²³¹² is an apocalyptic number.

It is an amenable number.

722312 is a deficient number, since it is larger than the sum of its proper divisors (632038).

722312 is a wasteful number, since it uses less digits than its factorization.

722312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90295 (or 90291 counting only the distinct ones).

The product of its digits is 168, while the sum is 17.

The square root of 722312 is about 849.8894045698. The cubic root of 722312 is about 89.7239276848.

Adding to 722312 its reverse (213227), we get a palindrome (935539).

It can be divided in two parts, 72 and 2312, that multiplied together give a square (166464 = 408²).

The spelling of 722312 in words is "seven hundred twenty-two thousand, three hundred twelve", and thus it is an iban number.