491455 has 8 divisors (see below), whose sum is σ = 593712. Its totient is φ = 390528.

The previous prime is 491429. The next prime is 491461. The reversal of 491455 is 554194.

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 491455 - 2⁵ = 491423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (74214).

2⁴⁹¹⁴⁵⁵ is an apocalyptic number.

491455 is a deficient number, since it is larger than the sum of its proper divisors (102257).

491455 is a wasteful number, since it uses less digits than its factorization.

491455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 3600, while the sum is 28.

The square root of 491455 is about 701.0385153471. The cubic root of 491455 is about 78.9153074104.

It can be divided in two parts, 491 and 455, that added together give a triangular number (946 = T₄₃).

The spelling of 491455 in words is "four hundred ninety-one thousand, four hundred fifty-five".