426491 has 8 divisors (see below), whose sum is σ = 468720. Its totient is φ = 385632.

The previous prime is 426487. The next prime is 426527. The reversal of 426491 is 194624.

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

It is not a de Polignac number, because 426491 - 2² = 426487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426491.

It is not an unprimeable number, because it can be changed into a prime (426401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 998.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2⁴²⁶⁴⁹¹ is an apocalyptic number.

426491 is a deficient number, since it is larger than the sum of its proper divisors (42229).

426491 is a wasteful number, since it uses less digits than its factorization.

426491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its digits is 1728, while the sum is 26.

The square root of 426491 is about 653.0627841180. The cubic root of 426491 is about 75.2725491008.

The spelling of 426491 in words is "four hundred twenty-six thousand, four hundred ninety-one".