1231115 has 4 divisors (see below), whose sum is σ = 1477344. Its totient is φ = 984888.

The previous prime is 1231099. The next prime is 1231127. The reversal of 1231115 is 5111321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5111321 = 233 ⋅21937.

It is a cyclic number.

It is not a de Polignac number, because 1231115 - 2⁴ = 1231099 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231115.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123107 + ... + 123116.

It is an arithmetic number, because the mean of its divisors is an integer number (369336).

2^1231115 is an apocalyptic number.

1231115 is a deficient number, since it is larger than the sum of its proper divisors (246229).

1231115 is an equidigital number, since it uses as much as digits as its factorization.

1231115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246228.

The product of its digits is 30, while the sum is 14.

The square root of 1231115 is about 1109.5562175933. The cubic root of 1231115 is about 107.1764927200.

Adding to 1231115 its reverse (5111321), we get a palindrome (6342436).

The spelling of 1231115 in words is "one million, two hundred thirty-one thousand, one hundred fifteen".