420791 has 8 divisors (see below), whose sum is σ = 491520. Its totient is φ = 352728.

The previous prime is 420781. The next prime is 420799. The reversal of 420791 is 197024.

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 420791 - 2¹⁸ = 158647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420799) by changing a digit.

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, 311 + ... + 968.

It is an arithmetic number, because the mean of its divisors is an integer number (61440).

2⁴²⁰⁷⁹¹ is an apocalyptic number.

420791 is a deficient number, since it is larger than the sum of its proper divisors (70729).

420791 is a wasteful number, since it uses less digits than its factorization.

420791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 420791 is about 648.6840525248. The cubic root of 420791 is about 74.9357078657.

The spelling of 420791 in words is "four hundred twenty thousand, seven hundred ninety-one".