722126 has 16 divisors (see below), whose sum is σ = 1167696. Its totient is φ = 333696.

The previous prime is 722123. The next prime is 722147. The reversal of 722126 is 621227.

722126 = 69² + 70² + ... + 135².

It is a junction number, because it is equal to n+sod(n) for n = 722098 and 722107.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722126.

It is not an unprimeable number, because it can be changed into a prime (722123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (72981).

2⁷²²¹²⁶ is an apocalyptic number.

722126 is a deficient number, since it is larger than the sum of its proper divisors (445570).

722126 is a wasteful number, since it uses less digits than its factorization.

722126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its digits is 336, while the sum is 20.

The square root of 722126 is about 849.7799715220. The cubic root of 722126 is about 89.7162255269.

It can be divided in two parts, 722 and 126, that added together give a palindrome (848).

The spelling of 722126 in words is "seven hundred twenty-two thousand, one hundred twenty-six".