491395 has 8 divisors (see below), whose sum is σ = 615456. Its totient is φ = 375936.

The previous prime is 491377. The next prime is 491417. The reversal of 491395 is 593194.

491395 = 80² + 81² + ... + 125².

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 491395 - 2¹⁷ = 360323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (76932).

2⁴⁹¹³⁹⁵ is an apocalyptic number.

491395 is a deficient number, since it is larger than the sum of its proper divisors (124061).

491395 is a wasteful number, since it uses less digits than its factorization.

491395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301.

The product of its digits is 4860, while the sum is 31.

The square root of 491395 is about 700.9957203864. The cubic root of 491395 is about 78.9120957830.

It can be divided in two parts, 49 and 1395, that added together give a square (1444 = 38²).

The spelling of 491395 in words is "four hundred ninety-one thousand, three hundred ninety-five".