491351 has 8 divisors (see below), whose sum is σ = 594720. Its totient is φ = 396288.

The previous prime is 491341. The next prime is 491353. The reversal of 491351 is 153194.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491351 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491351.

It is not an unprimeable number, because it can be changed into a prime (491353) 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, 1946 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (74340).

2⁴⁹¹³⁵¹ is an apocalyptic number.

491351 is a deficient number, since it is larger than the sum of its proper divisors (103369).

491351 is a wasteful number, since it uses less digits than its factorization.

491351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4153.

The product of its digits is 540, while the sum is 23.

The square root of 491351 is about 700.9643357547. The cubic root of 491351 is about 78.9097404233.

The spelling of 491351 in words is "four hundred ninety-one thousand, three hundred fifty-one".