71491 has 6 divisors (see below), whose sum is σ = 83220. Its totient is φ = 61236.

The previous prime is 71483. The next prime is 71503. The reversal of 71491 is 19417.

It is not a de Polignac number, because 71491 - 2³ = 71483 is a prime.

It is a super-2 number, since 2×71491² = 10221926162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 681 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (13870).

2⁷¹⁴⁹¹ is an apocalyptic number.

71491 is a deficient number, since it is larger than the sum of its proper divisors (11729).

71491 is a wasteful number, since it uses less digits than its factorization.

71491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1466 counting only the distinct ones).

The product of its digits is 252, while the sum is 22.

The square root of 71491 is about 267.3780095670. The cubic root of 71491 is about 41.5034109549.

The spelling of 71491 in words is "seventy-one thousand, four hundred ninety-one".