1147999 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 997920.

The previous prime is 1147997. The next prime is 1148029. The reversal of 1147999 is 9997411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1147999 - 2¹ = 1147997 is a prime.

1147999 is a Rhonda number in base 16.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16134 + ... + 16204.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^1147999 is an apocalyptic number.

1147999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1147999 is a deficient number, since it is larger than the sum of its proper divisors (165281).

1147999 is a wasteful number, since it uses less digits than its factorization.

1147999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

The product of its digits is 20412, while the sum is 40.

The square root of 1147999 is about 1071.4471522198. The cubic root of 1147999 is about 104.7081540447.

The spelling of 1147999 in words is "one million, one hundred forty-seven thousand, nine hundred ninety-nine".