1115997 has 4 divisors (see below), whose sum is σ = 1488000. Its totient is φ = 743996.

The previous prime is 1115993. The next prime is 1116001. The reversal of 1115997 is 7995111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7995111 = 3 ⋅2665037.

It is an interprime number because it is at equal distance from previous prime (1115993) and next prime (1116001).

It is a cyclic number.

It is not a de Polignac number, because 1115997 - 2² = 1115993 is a prime.

It is an Ulam number.

It is a D-number.

1115997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185997 + ... + 186002.

It is an arithmetic number, because the mean of its divisors is an integer number (372000).

2^1115997 is an apocalyptic number.

It is an amenable number.

1115997 is a deficient number, since it is larger than the sum of its proper divisors (372003).

1115997 is an equidigital number, since it uses as much as digits as its factorization.

1115997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372002.

The product of its digits is 2835, while the sum is 33.

The square root of 1115997 is about 1056.4075917940. The cubic root of 1115997 is about 103.7260108082.

It can be divided in two parts, 1115 and 997, that added together give a palindrome (2112).

The spelling of 1115997 in words is "one million, one hundred fifteen thousand, nine hundred ninety-seven".