722615 has 8 divisors (see below), whose sum is σ = 887568. Its totient is φ = 564480.

The previous prime is 722611. The next prime is 722633. The reversal of 722615 is 516227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 722615 - 2² = 722611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (110946).

2⁷²²⁶¹⁵ is an apocalyptic number.

722615 is a deficient number, since it is larger than the sum of its proper divisors (164953).

722615 is a wasteful number, since it uses less digits than its factorization.

722615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its digits is 840, while the sum is 23.

The square root of 722615 is about 850.0676443672. The cubic root of 722615 is about 89.7364719176.

It can be divided in two parts, 7 and 22615, that added together give a palindrome (22622).

The spelling of 722615 in words is "seven hundred twenty-two thousand, six hundred fifteen".