421132240 has 40 divisors (see below), whose sum is σ = 992936448. Its totient is φ = 166078080.

The previous prime is 421132237. The next prime is 421132297. The reversal of 421132240 is 42231124.

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

It is a congruent number.

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, 31392 + ... + 42751.

Almost surely, 2^421132240 is an apocalyptic number.

421132240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421132240 is an abundant number, since it is smaller than the sum of its proper divisors (571804208).

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

421132240 is a wasteful number, since it uses less digits than its factorization.

421132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74227 (or 74221 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421132240 is about 20521.5067672917. The cubic root of 421132240 is about 749.5595873588.

Adding to 421132240 its reverse (42231124), we get a palindrome (463363364).

The spelling of 421132240 in words is "four hundred twenty-one million, one hundred thirty-two thousand, two hundred forty".