1001115 has 12 divisors (see below), whose sum is σ = 1735344. Its totient is φ = 533904.

The previous prime is 1001107. The next prime is 1001123. The reversal of 1001115 is 5111001.

It is an interprime number because it is at equal distance from previous prime (1001107) and next prime (1001123).

It is not a de Polignac number, because 1001115 - 2³ = 1001107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1001097 and 1001106.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11079 + ... + 11168.

It is an arithmetic number, because the mean of its divisors is an integer number (144612).

2^1001115 is an apocalyptic number.

1001115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001115 is a deficient number, since it is larger than the sum of its proper divisors (734229).

1001115 is a wasteful number, since it uses less digits than its factorization.

1001115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22258 (or 22255 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 1001115 is about 1000.5573446835. The cubic root of 1001115 is about 100.0371528616.

Adding to 1001115 its reverse (5111001), we get a palindrome (6112116).

The spelling of 1001115 in words is "one million, one thousand, one hundred fifteen".