999572 has 24 divisors (see below), whose sum is σ = 2069760. Its totient is φ = 413280.

The previous prime is 999563. The next prime is 999599. The reversal of 999572 is 275999.

999572 is nontrivially palindromic in base 13.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 1427.

It is an arithmetic number, because the mean of its divisors is an integer number (86240).

2⁹⁹⁹⁵⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034880).

999572 is an abundant number, since it is smaller than the sum of its proper divisors (1070188).

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

999572 is a wasteful number, since it uses less digits than its factorization.

999572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1269 counting only the distinct ones).

The product of its digits is 51030, while the sum is 41.

The square root of 999572 is about 999.7859770971. The cubic root of 999572 is about 99.9857312975.

The spelling of 999572 in words is "nine hundred ninety-nine thousand, five hundred seventy-two".