999726 has 32 divisors (see below), whose sum is σ = 2462208. Its totient is φ = 263520.

The previous prime is 999721. The next prime is 999727. The reversal of 999726 is 627999.

999726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (76944).

2⁹⁹⁹⁷²⁶ is an apocalyptic number.

999726 is an abundant number, since it is smaller than the sum of its proper divisors (1462482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999726 is a wasteful number, since it uses less digits than its factorization.

999726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its digits is 61236, while the sum is 42.

The square root of 999726 is about 999.8629906142. The cubic root of 999726 is about 99.9908658324.

The spelling of 999726 in words is "nine hundred ninety-nine thousand, seven hundred twenty-six".