421443052 has 6 divisors (see below), whose sum is σ = 737525348. Its totient is φ = 210721524.

The previous prime is 421443049. The next prime is 421443079. The reversal of 421443052 is 250344124.

It is a happy number.

It is a super-2 number, since 2×421443052² = 355228492158149408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52680378 + ... + 52680385.

Almost surely, 2^421443052 is an apocalyptic number.

It is an amenable number.

421443052 is a deficient number, since it is larger than the sum of its proper divisors (316082296).

421443052 is a wasteful number, since it uses less digits than its factorization.

421443052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105360767 (or 105360765 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 421443052 is about 20529.0782062907. The cubic root of 421443052 is about 749.7439434048.

Adding to 421443052 its reverse (250344124), we get a palindrome (671787176).

The spelling of 421443052 in words is "four hundred twenty-one million, four hundred forty-three thousand, fifty-two".