1181115 has 32 divisors (see below), whose sum is σ = 2264640. Its totient is φ = 580608.

The previous prime is 1181099. The next prime is 1181137. The reversal of 1181115 is 5111811.

It is a happy number.

It is not a de Polignac number, because 1181115 - 2⁴ = 1181099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1419 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (70770).

2^1181115 is an apocalyptic number.

1181115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1181115 is a deficient number, since it is larger than the sum of its proper divisors (1083525).

1181115 is a wasteful number, since it uses less digits than its factorization.

1181115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 694 counting only the distinct ones).

The product of its digits is 40, while the sum is 18.

The square root of 1181115 is about 1086.7911482893. The cubic root of 1181115 is about 105.7054537997.

Adding to 1181115 its reverse (5111811), we get a palindrome (6292926).

It can be divided in two parts, 1181 and 115, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1181115 in words is "one million, one hundred eighty-one thousand, one hundred fifteen".