1149988 has 24 divisors (see below), whose sum is σ = 2338112. Its totient is φ = 484704.

The previous prime is 1149983. The next prime is 1149989. The reversal of 1149988 is 8899411.

It is a self number, because there is not a number n which added to its sum of digits gives 1149988.

It is not an unprimeable number, because it can be changed into a prime (1149983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570 + ... + 2182.

2^1149988 is an apocalyptic number.

It is an amenable number.

1149988 is an abundant number, since it is smaller than the sum of its proper divisors (1188124).

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

1149988 is a wasteful number, since it uses less digits than its factorization.

1149988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 689 counting only the distinct ones).

The product of its digits is 20736, while the sum is 40.

The square root of 1149988 is about 1072.3749344329. The cubic root of 1149988 is about 104.7685909021.

Adding to 1149988 its product of digits (20736), we get a square (1170724 = 1082²).

The spelling of 1149988 in words is "one million, one hundred forty-nine thousand, nine hundred eighty-eight".