1191471 has 8 divisors (see below), whose sum is σ = 1672320. Its totient is φ = 752472.

The previous prime is 1191457. The next prime is 1191481. The reversal of 1191471 is 1741911.

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

It is not a de Polignac number, because 1191471 - 2⁵ = 1191439 is a prime.

It is a super-3 number, since 3×1191471³ = 5074247932186140333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191431) 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 7 ways as a sum of consecutive naturals, for example, 10395 + ... + 10508.

It is an arithmetic number, because the mean of its divisors is an integer number (209040).

2^1191471 is an apocalyptic number.

1191471 is a deficient number, since it is larger than the sum of its proper divisors (480849).

1191471 is a wasteful number, since it uses less digits than its factorization.

1191471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20925.

The product of its digits is 252, while the sum is 24.

The square root of 1191471 is about 1091.5452349765. The cubic root of 1191471 is about 106.0134965608.

The spelling of 1191471 in words is "one million, one hundred ninety-one thousand, four hundred seventy-one".