420847 has 8 divisors (see below), whose sum is σ = 489600. Its totient is φ = 354264.

The previous prime is 420811. The next prime is 420851. The reversal of 420847 is 748024.

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 420847 - 2¹¹ = 418799 is a prime.

It is a super-2 number, since 2×420847² = 354224394818, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (61200).

2⁴²⁰⁸⁴⁷ is an apocalyptic number.

420847 is a deficient number, since it is larger than the sum of its proper divisors (68753).

420847 is a wasteful number, since it uses less digits than its factorization.

420847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 420847 is about 648.7272153995. The cubic root of 420847 is about 74.9390319335.

The spelling of 420847 in words is "four hundred twenty thousand, eight hundred forty-seven".