1188121248 has 36 divisors (see below), whose sum is σ = 3378720618. Its totient is φ = 396040320.

The previous prime is 1188121229. The next prime is 1188121267. The reversal of 1188121248 is 8421218811.

It is an interprime number because it is at equal distance from previous prime (1188121229) and next prime (1188121267).

It can be written as a sum of positive squares in only one way, i.e., 884943504 + 303177744 = 29748^2 + 17412^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2062423 + ... + 2062998.

Almost surely, 2^1188121248 is an apocalyptic number.

1188121248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1188121248 is an abundant number, since it is smaller than the sum of its proper divisors (2190599370).

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

1188121248 is a wasteful number, since it uses less digits than its factorization.

1188121248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125437 (or 4125426 counting only the distinct ones).

The product of its digits is 8192, while the sum is 36.

The square root of 1188121248 is about 34469.1347149881. The cubic root of 1188121248 is about 1059.1405303212.

The spelling of 1188121248 in words is "one billion, one hundred eighty-eight million, one hundred twenty-one thousand, two hundred forty-eight".