420879591 has 64 divisors (see below), whose sum is σ = 743731200. Its totient is φ = 232243200.

The previous prime is 420879541. The next prime is 420879593. The reversal of 420879591 is 195978024.

It is not a de Polignac number, because 420879591 - 2¹¹ = 420877543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420879593) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 155175 + ... + 157863.

It is an arithmetic number, because the mean of its divisors is an integer number (11620800).

Almost surely, 2^420879591 is an apocalyptic number.

420879591 is a deficient number, since it is larger than the sum of its proper divisors (322851609).

420879591 is a wasteful number, since it uses less digits than its factorization.

420879591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 420879591 is about 20515.3501310604. The cubic root of 420879591 is about 749.4096634589.

The spelling of 420879591 in words is "four hundred twenty million, eight hundred seventy-nine thousand, five hundred ninety-one".