421438516 has 12 divisors (see below), whose sum is σ = 738515232. Its totient is φ = 210434168.

The previous prime is 421438489. The next prime is 421438531. The reversal of 421438516 is 615834124.

It is a super-2 number, since 2×421438516² = 355220845536564512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 67930 + ... + 73873.

It is an arithmetic number, because the mean of its divisors is an integer number (61542936).

Almost surely, 2^421438516 is an apocalyptic number.

It is an amenable number.

421438516 is a deficient number, since it is larger than the sum of its proper divisors (317076716).

421438516 is a wasteful number, since it uses less digits than its factorization.

421438516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142550 (or 142548 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 421438516 is about 20528.9677285537. The cubic root of 421438516 is about 749.7412535588.

The spelling of 421438516 in words is "four hundred twenty-one million, four hundred thirty-eight thousand, five hundred sixteen".