420845843 has 8 divisors (see below), whose sum is σ = 459915456. Its totient is φ = 381911400.

The previous prime is 420845833. The next prime is 420845851. The reversal of 420845843 is 348548024.

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 420845843 - 2⁸ = 420845587 is a prime.

It is a super-2 number, since 2×420845843² = 354222447140761298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420845797 and 420845806.

It is not an unprimeable number, because it can be changed into a prime (420845833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27221 + ... + 39782.

It is an arithmetic number, because the mean of its divisors is an integer number (57489432).

Almost surely, 2^420845843 is an apocalyptic number.

420845843 is a deficient number, since it is larger than the sum of its proper divisors (39069613).

420845843 is a wasteful number, since it uses less digits than its factorization.

420845843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67585.

The product of its (nonzero) digits is 122880, while the sum is 38.

The square root of 420845843 is about 20514.5276085022. The cubic root of 420845843 is about 749.3896325888.

The spelling of 420845843 in words is "four hundred twenty million, eight hundred forty-five thousand, eight hundred forty-three".