420986 has 8 divisors (see below), whose sum is σ = 648660. Its totient is φ = 204768.

The previous prime is 420977. The next prime is 420997. The reversal of 420986 is 689024.

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 101761 = 565^2 + 319^2 .

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 2918.

2⁴²⁰⁹⁸⁶ is an apocalyptic number.

420986 is a deficient number, since it is larger than the sum of its proper divisors (227674).

420986 is a wasteful number, since it uses less digits than its factorization.

420986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 420986 is about 648.8343394118. The cubic root of 420986 is about 74.9472814706.

The spelling of 420986 in words is "four hundred twenty thousand, nine hundred eighty-six".