491420 has 12 divisors (see below), whose sum is σ = 1032024. Its totient is φ = 196560.

The previous prime is 491417. The next prime is 491423. The reversal of 491420 is 24194.

It is an interprime number because it is at equal distance from previous prime (491417) and next prime (491423).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 24571 = 491420 / (4 + 9 + 1 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 491392 and 491401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12266 + ... + 12305.

It is an arithmetic number, because the mean of its divisors is an integer number (86002).

2⁴⁹¹⁴²⁰ is an apocalyptic number.

It is an amenable number.

491420 is an abundant number, since it is smaller than the sum of its proper divisors (540604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491420 is a wasteful number, since it uses less digits than its factorization.

491420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24580 (or 24578 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 491420 is about 701.0135519375. The cubic root of 491420 is about 78.9134339928.

The spelling of 491420 in words is "four hundred ninety-one thousand, four hundred twenty".