420539861 has 8 divisors (see below), whose sum is σ = 485376384. Its totient is φ = 356893200.

The previous prime is 420539857. The next prime is 420539909. The reversal of 420539861 is 168935024.

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 420539861 - 2² = 420539857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420530861) 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, 296705 + ... + 298118.

It is an arithmetic number, because the mean of its divisors is an integer number (60672048).

Almost surely, 2^420539861 is an apocalyptic number.

It is an amenable number.

420539861 is a deficient number, since it is larger than the sum of its proper divisors (64836523).

420539861 is a wasteful number, since it uses less digits than its factorization.

420539861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594931.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 420539861 is about 20507.0685618398. The cubic root of 420539861 is about 749.2079703984.

The spelling of 420539861 in words is "four hundred twenty million, five hundred thirty-nine thousand, eight hundred sixty-one".