421241672 has 8 divisors (see below), whose sum is σ = 789828150. Its totient is φ = 210620832.

The previous prime is 421241669. The next prime is 421241677. The reversal of 421241672 is 276142124.

It can be written as a sum of positive squares in only one way, i.e., 398641156 + 22600516 = 19966^2 + 4754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (421241677) 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 as a sum of consecutive naturals, namely, 26327597 + ... + 26327612.

Almost surely, 2^421241672 is an apocalyptic number.

It is an amenable number.

421241672 is a deficient number, since it is larger than the sum of its proper divisors (368586478).

421241672 is a wasteful number, since it uses less digits than its factorization.

421241672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52655215 (or 52655211 counting only the distinct ones).

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

The square root of 421241672 is about 20524.1728700574. The cubic root of 421241672 is about 749.6245065561.

Adding to 421241672 its reverse (276142124), we get a palindrome (697383796).

The spelling of 421241672 in words is "four hundred twenty-one million, two hundred forty-one thousand, six hundred seventy-two".