421552240 has 80 divisors (see below), whose sum is σ = 1035648000. Its totient is φ = 159134976.

The previous prime is 421552231. The next prime is 421552249. The reversal of 421552240 is 42255124.

It is an interprime number because it is at equal distance from previous prime (421552231) and next prime (421552249).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421552249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703461 + ... + 704059.

It is an arithmetic number, because the mean of its divisors is an integer number (12945600).

Almost surely, 2^421552240 is an apocalyptic number.

421552240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421552240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517824000).

421552240 is an abundant number, since it is smaller than the sum of its proper divisors (614095760).

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

421552240 is a wasteful number, since it uses less digits than its factorization.

421552240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 421552240 is about 20531.7373838650. The cubic root of 421552240 is about 749.8086860176.

The spelling of 421552240 in words is "four hundred twenty-one million, five hundred fifty-two thousand, two hundred forty".