420961861 has 8 divisors (see below), whose sum is σ = 429287040. Its totient is φ = 412718208.

The previous prime is 420961859. The next prime is 420961867. The reversal of 420961861 is 168169024.

It is a happy number.

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 420961861 - 2¹ = 420961859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420961861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420961867) 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, 9901 + ... + 30658.

It is an arithmetic number, because the mean of its divisors is an integer number (53660880).

Almost surely, 2^420961861 is an apocalyptic number.

It is an amenable number.

420961861 is a deficient number, since it is larger than the sum of its proper divisors (8325179).

420961861 is a wasteful number, since it uses less digits than its factorization.

420961861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40763.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 420961861 is about 20517.3551170710. The cubic root of 420961861 is about 749.4584897088.

The spelling of 420961861 in words is "four hundred twenty million, nine hundred sixty-one thousand, eight hundred sixty-one".