71491143 has 8 divisors (see below), whose sum is σ = 95390208. Its totient is φ = 47626424.

The previous prime is 71491111. The next prime is 71491151. The reversal of 71491143 is 34119417.

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

It is a cyclic number.

It is not a de Polignac number, because 71491143 - 2⁵ = 71491111 is a prime.

It is a super-2 number, since 2×71491143² = 10221967054892898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71491143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71491643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3255 + ... + 12392.

It is an arithmetic number, because the mean of its divisors is an integer number (11923776).

Almost surely, 2^71491143 is an apocalyptic number.

71491143 is a deficient number, since it is larger than the sum of its proper divisors (23899065).

71491143 is a wasteful number, since it uses less digits than its factorization.

71491143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17173.

The product of its digits is 3024, while the sum is 30.

The square root of 71491143 is about 8455.2435210347. The cubic root of 71491143 is about 415.0343862735.

The spelling of 71491143 in words is "seventy-one million, four hundred ninety-one thousand, one hundred forty-three".