421215408 has 60 divisors (see below), whose sum is σ = 1240869240. Its totient is φ = 133014528.

The previous prime is 421215407. The next prime is 421215413. The reversal of 421215408 is 804512124.

421215408 is a `hidden beast` number, since 42 + 1 + 215 + 408 = 666.

It is not an unprimeable number, because it can be changed into a prime (421215407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74241 + ... + 79712.

It is an arithmetic number, because the mean of its divisors is an integer number (20681154).

Almost surely, 2^421215408 is an apocalyptic number.

421215408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421215408 is an abundant number, since it is smaller than the sum of its proper divisors (819653832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421215408 is a wasteful number, since it uses less digits than its factorization.

421215408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153986 (or 153977 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 421215408 is about 20523.5330291838. The cubic root of 421215408 is about 749.6089267844.

The spelling of 421215408 in words is "four hundred twenty-one million, two hundred fifteen thousand, four hundred eight".