1111971 has 8 divisors (see below), whose sum is σ = 1694464. Its totient is φ = 635400.

The previous prime is 1111967. The next prime is 1111991. The reversal of 1111971 is 1791111.

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

It is not a de Polignac number, because 1111971 - 2² = 1111967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 52951 = 1111971 / (1 + 1 + 1 + 1 + 9 + 7 + 1).

It is the 1055-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111921) by changing a digit.

It is a nontrivial repunit in base 1054.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26455 + ... + 26496.

It is an arithmetic number, because the mean of its divisors is an integer number (211808).

2^1111971 is an apocalyptic number.

1111971 is a deficient number, since it is larger than the sum of its proper divisors (582493).

1111971 is an equidigital number, since it uses as much as digits as its factorization.

1111971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52961.

The product of its digits is 63, while the sum is 21.

The square root of 1111971 is about 1054.5003556187. The cubic root of 1111971 is about 103.6011287226.

The spelling of 1111971 in words is "one million, one hundred eleven thousand, nine hundred seventy-one".