420679 has 8 divisors (see below), whose sum is σ = 506240. Its totient is φ = 341496.

The previous prime is 420677. The next prime is 420683. The reversal of 420679 is 976024.

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 420679 - 2¹ = 420677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420671) 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, 1449 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (63280).

2⁴²⁰⁶⁷⁹ is an apocalyptic number.

420679 is a deficient number, since it is larger than the sum of its proper divisors (85561).

420679 is a wasteful number, since it uses less digits than its factorization.

420679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 420679 is about 648.5977181582. The cubic root of 420679 is about 74.9290588451.

The spelling of 420679 in words is "four hundred twenty thousand, six hundred seventy-nine".