1181952252 has 144 divisors (see below), whose sum is σ = 3344769792. Its totient is φ = 349470720.

The previous prime is 1181952241. The next prime is 1181952257. The reversal of 1181952252 is 2522591811.

1181952252 is a `hidden beast` number, since 1 + 1 + 81 + 9 + 522 + 52 = 666.

It is a super-2 number, since 2×1181952252² = 2794022252015743008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181952257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3728398 + ... + 3728714.

It is an arithmetic number, because the mean of its divisors is an integer number (23227568).

Almost surely, 2^1181952252 is an apocalyptic number.

1181952252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181952252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672384896).

1181952252 is an abundant number, since it is smaller than the sum of its proper divisors (2162817540).

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

1181952252 is a wasteful number, since it uses less digits than its factorization.

1181952252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 623 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 1181952252 is about 34379.5324575539. The cubic root of 1181952252 is about 1057.3042489307.

The spelling of 1181952252 in words is "one billion, one hundred eighty-one million, nine hundred fifty-two thousand, two hundred fifty-two".