421584747 has 4 divisors (see below), whose sum is σ = 562113000. Its totient is φ = 281056496.

The previous prime is 421584743. The next prime is 421584797. The reversal of 421584747 is 747485124.

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

It is a cyclic number.

It is not a de Polignac number, because 421584747 - 2² = 421584743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421584699 and 421584708.

It is not an unprimeable number, because it can be changed into a prime (421584743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70264122 + ... + 70264127.

It is an arithmetic number, because the mean of its divisors is an integer number (140528250).

Almost surely, 2^421584747 is an apocalyptic number.

421584747 is a deficient number, since it is larger than the sum of its proper divisors (140528253).

421584747 is a wasteful number, since it uses less digits than its factorization.

421584747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140528252.

The product of its digits is 250880, while the sum is 42.

The square root of 421584747 is about 20532.5289966921. The cubic root of 421584747 is about 749.8279587610.

The spelling of 421584747 in words is "four hundred twenty-one million, five hundred eighty-four thousand, seven hundred forty-seven".