1115172 has 18 divisors (see below), whose sum is σ = 2818998. Its totient is φ = 371712.

The previous prime is 1115131. The next prime is 1115189. The reversal of 1115172 is 2715111.

It is a happy number.

1115172 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 36 = 1056^2 + 6^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15453 + ... + 15524.

It is an arithmetic number, because the mean of its divisors is an integer number (156611).

2^1115172 is an apocalyptic number.

1115172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1115172 is an abundant number, since it is smaller than the sum of its proper divisors (1703826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115172 is a wasteful number, since it uses less digits than its factorization.

1115172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30987 (or 30982 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 1115172 is about 1056.0170453170. The cubic root of 1115172 is about 103.7004447137.

The spelling of 1115172 in words is "one million, one hundred fifteen thousand, one hundred seventy-two".