1231113 has 8 divisors (see below), whose sum is σ = 1767808. Its totient is φ = 757584.

The previous prime is 1231099. The next prime is 1231127. The reversal of 1231113 is 3111321.

It is an interprime number because it is at equal distance from previous prime (1231099) and next prime (1231127).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231113 - 2⁶ = 1231049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15745 + ... + 15822.

It is an arithmetic number, because the mean of its divisors is an integer number (220976).

2^1231113 is an apocalyptic number.

1231113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231113 is a deficient number, since it is larger than the sum of its proper divisors (536695).

1231113 is a wasteful number, since it uses less digits than its factorization.

1231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31583.

The product of its digits is 18, while the sum is 12.

The square root of 1231113 is about 1109.5553163317. Note that the first 3 decimals coincide. The cubic root of 1231113 is about 107.1764346824.

Adding to 1231113 its reverse (3111321), we get a palindrome (4342434).

It can be divided in two parts, 12 and 31113, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 1231113 in words is "one million, two hundred thirty-one thousand, one hundred thirteen".