999999252 has 108 divisors (see below), whose sum is σ = 2957834880. Its totient is φ = 284028192.

The previous prime is 999999229. The next prime is 999999323. The reversal of 999999252 is 252999999.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 999999252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 314173 + ... + 317339.

It is an arithmetic number, because the mean of its divisors is an integer number (27387360).

Almost surely, 2^999999252 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 999999252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478917440).

999999252 is an abundant number, since it is smaller than the sum of its proper divisors (1957835628).

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

999999252 is a wasteful number, since it uses less digits than its factorization.

999999252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370 (or 3358 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 63.

The square root of 999999252 is about 31622.7647747631. The cubic root of 999999252 is about 999.9997506666. Note that the first 3 decimals are identical.

The spelling of 999999252 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, two hundred fifty-two".