421887567 has 4 divisors (see below), whose sum is σ = 562516760. Its totient is φ = 281258376.

The previous prime is 421887541. The next prime is 421887601. The reversal of 421887567 is 765788124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421887567 - 2⁷ = 421887439 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 (421887667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70314592 + ... + 70314597.

It is an arithmetic number, because the mean of its divisors is an integer number (140629190).

Almost surely, 2^421887567 is an apocalyptic number.

421887567 is a deficient number, since it is larger than the sum of its proper divisors (140629193).

421887567 is a wasteful number, since it uses less digits than its factorization.

421887567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140629192.

The product of its digits is 752640, while the sum is 48.

The square root of 421887567 is about 20539.9018254713. The cubic root of 421887567 is about 750.0074470372.

The spelling of 421887567 in words is "four hundred twenty-one million, eight hundred eighty-seven thousand, five hundred sixty-seven".