4991271 has 8 divisors (see below), whose sum is σ = 6679680. Its totient is φ = 3315192.

The previous prime is 4991267. The next prime is 4991291. The reversal of 4991271 is 1721994.

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

It is not a de Polignac number, because 4991271 - 2² = 4991267 is a prime.

4991271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2091 + ... + 3788.

It is an arithmetic number, because the mean of its divisors is an integer number (834960).

Almost surely, 2^4991271 is an apocalyptic number.

4991271 is a deficient number, since it is larger than the sum of its proper divisors (1688409).

4991271 is a wasteful number, since it uses less digits than its factorization.

4991271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165.

The product of its digits is 4536, while the sum is 33.

The square root of 4991271 is about 2234.1152611269. The cubic root of 4991271 is about 170.8980275035.

It can be divided in two parts, 499 and 1271, that added together give a triangular number (1770 = T₅₉).

The spelling of 4991271 in words is "four million, nine hundred ninety-one thousand, two hundred seventy-one".