1152590985 has 144 divisors (see below), whose sum is σ = 2583550080. Its totient is φ = 485896320.

The previous prime is 1152590983. The next prime is 1152591047. The reversal of 1152590985 is 5890952511.

1152590985 is a `hidden beast` number, since 1 + 1 + 52 + 590 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 1152590985 - 2¹ = 1152590983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1152590985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152590981) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1117420 + ... + 1118450.

It is an arithmetic number, because the mean of its divisors is an integer number (17941320).

Almost surely, 2^1152590985 is an apocalyptic number.

1152590985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1152590985 is an abundant number, since it is smaller than the sum of its proper divisors (1430959095).

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

1152590985 is a wasteful number, since it uses less digits than its factorization.

1152590985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The square root of 1152590985 is about 33949.8304119476. The cubic root of 1152590985 is about 1048.4757884794.

The spelling of 1152590985 in words is "one billion, one hundred fifty-two million, five hundred ninety thousand, nine hundred eighty-five".