1181799 has 6 divisors (see below), whose sum is σ = 1707056. Its totient is φ = 787860.

The previous prime is 1181777. The next prime is 1181839. The reversal of 1181799 is 9971811.

It is not a de Polignac number, because 1181799 - 2⁵ = 1181767 is a prime.

It is a Duffinian number.

1181799 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65647 + ... + 65664.

2^1181799 is an apocalyptic number.

1181799 is a deficient number, since it is larger than the sum of its proper divisors (525257).

1181799 is a wasteful number, since it uses less digits than its factorization.

1181799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131317 (or 131314 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 1181799 is about 1087.1057906202. The cubic root of 1181799 is about 105.7258550245.

It can be divided in two parts, 118179 and 9, that multiplied together give a triangular number (1063611 = T₁₄₅₈).

The spelling of 1181799 in words is "one million, one hundred eighty-one thousand, seven hundred ninety-nine".