1115905 has 8 divisors (see below), whose sum is σ = 1530432. Its totient is φ = 765168.

The previous prime is 1115899. The next prime is 1115911. The reversal of 1115905 is 5095111.

It is an interprime number because it is at equal distance from previous prime (1115899) and next prime (1115911).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115905 is a prime.

It is a Duffinian number.

1115905 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15907 + ... + 15976.

It is an arithmetic number, because the mean of its divisors is an integer number (191304).

2^1115905 is an apocalyptic number.

It is an amenable number.

1115905 is a deficient number, since it is larger than the sum of its proper divisors (414527).

1115905 is an equidigital number, since it uses as much as digits as its factorization.

1115905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31895.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1115905 is about 1056.3640470974. The cubic root of 1115905 is about 103.7231604256.

The spelling of 1115905 in words is "one million, one hundred fifteen thousand, nine hundred five".