111999252 has 12 divisors (see below), whose sum is σ = 261331616. Its totient is φ = 37333080.

The previous prime is 111999241. The next prime is 111999253. The reversal of 111999252 is 252999111.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 111999252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111999253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4666624 + ... + 4666647.

Almost surely, 2^111999252 is an apocalyptic number.

111999252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111999252 is an abundant number, since it is smaller than the sum of its proper divisors (149332364).

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

111999252 is a wasteful number, since it uses less digits than its factorization.

111999252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9333278 (or 9333276 counting only the distinct ones).

The product of its digits is 14580, while the sum is 39.

The square root of 111999252 is about 10582.9699045211. The cubic root of 111999252 is about 482.0273797455.

The spelling of 111999252 in words is "one hundred eleven million, nine hundred ninety-nine thousand, two hundred fifty-two".