421641740 has 24 divisors (see below), whose sum is σ = 953559600. Its totient is φ = 155683008.

The previous prime is 421641733. The next prime is 421641793. The reversal of 421641740 is 47146124.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 810590 + ... + 811109.

It is an arithmetic number, because the mean of its divisors is an integer number (39731650).

Almost surely, 2^421641740 is an apocalyptic number.

It is an amenable number.

421641740 is an abundant number, since it is smaller than the sum of its proper divisors (531917860).

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

421641740 is a wasteful number, since it uses less digits than its factorization.

421641740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621721 (or 1621719 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 421641740 is about 20533.9168207140. The cubic root of 421641740 is about 749.8617463680.

Adding to 421641740 its reverse (47146124), we get a palindrome (468787864).

The spelling of 421641740 in words is "four hundred twenty-one million, six hundred forty-one thousand, seven hundred forty".