421352540 has 48 divisors (see below), whose sum is σ = 1015664832. Its totient is φ = 143832576.

The previous prime is 421352539. The next prime is 421352543. The reversal of 421352540 is 45253124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421352543) 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, 26162 + ... + 39078.

It is an arithmetic number, because the mean of its divisors is an integer number (21159684).

Almost surely, 2^421352540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421352540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507832416).

421352540 is an abundant number, since it is smaller than the sum of its proper divisors (594312292).

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

421352540 is a wasteful number, since it uses less digits than its factorization.

421352540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166 (or 13164 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 421352540 is about 20526.8736051061. The cubic root of 421352540 is about 749.6902661783.

The spelling of 421352540 in words is "four hundred twenty-one million, three hundred fifty-two thousand, five hundred forty".