421224240 has 40 divisors (see below), whose sum is σ = 1305795888. Its totient is φ = 112326400.

The previous prime is 421224227. The next prime is 421224257. The reversal of 421224240 is 42422124.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877311 + ... + 877790.

Almost surely, 2^421224240 is an apocalyptic number.

421224240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421224240 is an abundant number, since it is smaller than the sum of its proper divisors (884571648).

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

421224240 is a wasteful number, since it uses less digits than its factorization.

421224240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755117 (or 1755111 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 421224240 is about 20523.7481956878. The cubic root of 421224240 is about 749.6141659880.

Adding to 421224240 its reverse (42422124), we get a palindrome (463646364).

The spelling of 421224240 in words is "four hundred twenty-one million, two hundred twenty-four thousand, two hundred forty".