1155015 has 12 divisors (see below), whose sum is σ = 2002104. Its totient is φ = 615984.

The previous prime is 1155001. The next prime is 1155017. The reversal of 1155015 is 5105511.

It is not a de Polignac number, because 1155015 - 2⁷ = 1154887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12789 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (166842).

2^1155015 is an apocalyptic number.

1155015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155015 is a deficient number, since it is larger than the sum of its proper divisors (847089).

1155015 is a wasteful number, since it uses less digits than its factorization.

1155015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25678 (or 25675 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 1155015 is about 1074.7162416192. The cubic root of 1155015 is about 104.9210290559.

The spelling of 1155015 in words is "one million, one hundred fifty-five thousand, fifteen".