491151 has 8 divisors (see below), whose sum is σ = 667440. Its totient is φ = 321152.

The previous prime is 491149. The next prime is 491159. The reversal of 491151 is 151194.

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 491151 - 2¹ = 491149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491159) 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, 1386 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (83430).

2⁴⁹¹¹⁵¹ is an apocalyptic number.

491151 is a deficient number, since it is larger than the sum of its proper divisors (176289).

491151 is a wasteful number, since it uses less digits than its factorization.

491151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145.

The product of its digits is 180, while the sum is 21.

The square root of 491151 is about 700.8216606242. The cubic root of 491151 is about 78.8990324706.

The spelling of 491151 in words is "four hundred ninety-one thousand, one hundred fifty-one".