420587421 has 8 divisors (see below), whose sum is σ = 565064544. Its totient is φ = 278250960.

The previous prime is 420587369. The next prime is 420587423. The reversal of 420587421 is 124785024.

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

It is not a de Polignac number, because 420587421 - 2¹⁷ = 420456349 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420587423) 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, 534706 + ... + 535491.

It is an arithmetic number, because the mean of its divisors is an integer number (70633068).

Almost surely, 2^420587421 is an apocalyptic number.

It is an amenable number.

420587421 is a deficient number, since it is larger than the sum of its proper divisors (144477123).

420587421 is a wasteful number, since it uses less digits than its factorization.

420587421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070331.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 420587421 is about 20508.2281292168. The cubic root of 420587421 is about 749.2362126581.

The spelling of 420587421 in words is "four hundred twenty million, five hundred eighty-seven thousand, four hundred twenty-one".