421241540 has 12 divisors (see below), whose sum is σ = 884607276. Its totient is φ = 168496608.

The previous prime is 421241537. The next prime is 421241543. The reversal of 421241540 is 45142124.

It is an interprime number because it is at equal distance from previous prime (421241537) and next prime (421241543).

It can be written as a sum of positive squares in 2 ways, for example, as 245360896 + 175880644 = 15664^2 + 13262^2 .

It is not an unprimeable number, because it can be changed into a prime (421241543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10531019 + ... + 10531058.

It is an arithmetic number, because the mean of its divisors is an integer number (73717273).

Almost surely, 2^421241540 is an apocalyptic number.

It is an amenable number.

421241540 is an abundant number, since it is smaller than the sum of its proper divisors (463365736).

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

421241540 is a wasteful number, since it uses less digits than its factorization.

421241540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21062086 (or 21062084 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 421241540 is about 20524.1696543368. The cubic root of 421241540 is about 749.6244282555.

Adding to 421241540 its reverse (45142124), we get a palindrome (466383664).

The spelling of 421241540 in words is "four hundred twenty-one million, two hundred forty-one thousand, five hundred forty".