1001172 has 12 divisors (see below), whose sum is σ = 2336096. Its totient is φ = 333720.

The previous prime is 1001159. The next prime is 1001173. The reversal of 1001172 is 2711001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 83431 = 1001172 / (1 + 0 + 0 + 1 + 1 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41704 + ... + 41727.

2^1001172 is an apocalyptic number.

1001172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001172 is an abundant number, since it is smaller than the sum of its proper divisors (1334924).

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

1001172 is a wasteful number, since it uses less digits than its factorization.

1001172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83438 (or 83436 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 1001172 is about 1000.5858284025. The cubic root of 1001172 is about 100.0390514146.

Adding to 1001172 its reverse (2711001), we get a palindrome (3712173).

The spelling of 1001172 in words is "one million, one thousand, one hundred seventy-two".