491015 has 8 divisors (see below), whose sum is σ = 673440. Its totient is φ = 336672.

The previous prime is 491003. The next prime is 491039. The reversal of 491015 is 510194.

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

It is not a de Polignac number, because 491015 - 2⁶ = 490951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6980 + ... + 7049.

It is an arithmetic number, because the mean of its divisors is an integer number (84180).

2⁴⁹¹⁰¹⁵ is an apocalyptic number.

491015 is a deficient number, since it is larger than the sum of its proper divisors (182425).

491015 is a wasteful number, since it uses less digits than its factorization.

491015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14041.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 491015 is about 700.7246249419. The cubic root of 491015 is about 78.8917494022.

It can be divided in two parts, 4 and 91015, that added together give a palindrome (91019).

The spelling of 491015 in words is "four hundred ninety-one thousand, fifteen".