1191980124 has 216 divisors, whose sum is σ = 3417173760. Its totient is φ = 363007008.

The previous prime is 1191980117. The next prime is 1191980147. The reversal of 1191980124 is 4210891911.

It is a super-2 number, since 2×1191980124² = 2841633232022110752, 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15088317 + ... + 15088395.

Almost surely, 2^1191980124 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 1191980124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1708586880).

1191980124 is an abundant number, since it is smaller than the sum of its proper divisors (2225193636).

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

1191980124 is a wasteful number, since it uses less digits than its factorization.

1191980124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1191980124 is about 34525.0651556228. The cubic root of 1191980124 is about 1060.2859451659.

It can be divided in two parts, 11919 and 80124, that multiplied together give a triangular number (954997956 = T₄₃₇₀₃).

The spelling of 1191980124 in words is "one billion, one hundred ninety-one million, nine hundred eighty thousand, one hundred twenty-four".