1243115 has 8 divisors (see below), whose sum is σ = 1520208. Its totient is φ = 975520.

The previous prime is 1243111. The next prime is 1243129. The reversal of 1243115 is 5113421.

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

It is not a de Polignac number, because 1243115 - 2² = 1243111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243093 and 1243102.

It is not an unprimeable number, because it can be changed into a prime (1243111) 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, 2081 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (190026).

2^1243115 is an apocalyptic number.

1243115 is a deficient number, since it is larger than the sum of its proper divisors (277093).

1243115 is an equidigital number, since it uses as much as digits as its factorization.

1243115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749.

The product of its digits is 120, while the sum is 17.

The square root of 1243115 is about 1114.9506715546. The cubic root of 1243115 is about 107.5235931630.

Adding to 1243115 its reverse (5113421), we get a palindrome (6356536).

The spelling of 1243115 in words is "one million, two hundred forty-three thousand, one hundred fifteen".