421587478 has 16 divisors (see below), whose sum is σ = 681387840. Its totient is φ = 194475456.

The previous prime is 421587457. The next prime is 421587479. The reversal of 421587478 is 874785124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421587479) 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, 69283 + ... + 75121.

It is an arithmetic number, because the mean of its divisors is an integer number (42586740).

Almost surely, 2^421587478 is an apocalyptic number.

421587478 is a deficient number, since it is larger than the sum of its proper divisors (259800362).

421587478 is a wasteful number, since it uses less digits than its factorization.

421587478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8631.

The product of its digits is 501760, while the sum is 46.

The square root of 421587478 is about 20532.5955008128. The cubic root of 421587478 is about 749.8295778706.

The spelling of 421587478 in words is "four hundred twenty-one million, five hundred eighty-seven thousand, four hundred seventy-eight".