420981 has 8 divisors (see below), whose sum is σ = 612384. Its totient is φ = 255120.

The previous prime is 420977. The next prime is 420997. The reversal of 420981 is 189024.

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

It is not a de Polignac number, because 420981 - 2² = 420977 is a prime.

It is a super-2 number, since 2×420981² = 354450004722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420981.

It is not an unprimeable number, because it can be changed into a prime (420941) 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, 6346 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (76548).

2⁴²⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

420981 is a deficient number, since it is larger than the sum of its proper divisors (191403).

420981 is a wasteful number, since it uses less digits than its factorization.

420981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12771.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 420981 is about 648.8304863368. The cubic root of 420981 is about 74.9469847562.

The spelling of 420981 in words is "four hundred twenty thousand, nine hundred eighty-one".