491535 has 32 divisors (see below), whose sum is σ = 956160. Its totient is φ = 237600.

The previous prime is 491531. The next prime is 491537. The reversal of 491535 is 535194.

491535 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 491535 - 2² = 491531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

491535 is a lucky number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 491499 and 491508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1320 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (29880).

2⁴⁹¹⁵³⁵ is an apocalyptic number.

491535 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491535 is a deficient number, since it is larger than the sum of its proper divisors (464625).

491535 is a wasteful number, since it uses less digits than its factorization.

491535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 491535 is about 701.0955712312. The cubic root of 491535 is about 78.9195891738.

It can be divided in two parts, 4915 and 35, that added together give a triangular number (4950 = T₉₉).

The spelling of 491535 in words is "four hundred ninety-one thousand, five hundred thirty-five".