1115987 has 2 divisors, whose sum is σ = 1115988. Its totient is φ = 1115986.

The previous prime is 1115941. The next prime is 1115993. The reversal of 1115987 is 7895111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115987 - 2⁶ = 1115923 is a prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (1114987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557993 + 557994.

It is an arithmetic number, because the mean of its divisors is an integer number (557994).

2^1115987 is an apocalyptic number.

1115987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115987 is an equidigital number, since it uses as much as digits as its factorization.

1115987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 32.

The square root of 1115987 is about 1056.4028587618. The cubic root of 1115987 is about 103.7257009916.

The spelling of 1115987 in words is "one million, one hundred fifteen thousand, nine hundred eighty-seven".