1149559900 has 18 divisors (see below), whose sum is σ = 2494545200. Its totient is φ = 459823920.

The previous prime is 1149559897. The next prime is 1149559973. The reversal of 1149559900 is 99559411.

It is a congruent number.

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, 5747700 + ... + 5747899.

Almost surely, 2^1149559900 is an apocalyptic number.

1149559900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1149559900 is an abundant number, since it is smaller than the sum of its proper divisors (1344985300).

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

1149559900 is a wasteful number, since it uses less digits than its factorization.

1149559900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495613 (or 11495606 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1149559900 is about 33905.1603741967. The cubic root of 1149559900 is about 1047.5558873735. Note that the first 3 decimals are identical.

The spelling of 1149559900 in words is "one billion, one hundred forty-nine million, five hundred fifty-nine thousand, nine hundred".