421642024 has 16 divisors (see below), whose sum is σ = 837083700. Its totient is φ = 198419712.

The previous prime is 421642021. The next prime is 421642037. The reversal of 421642024 is 420246124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 412821124 + 8820900 = 20318^2 + 2970^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421642024.

It is not an unprimeable number, because it can be changed into a prime (421642021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550019 + ... + 1550290.

Almost surely, 2^421642024 is an apocalyptic number.

It is an amenable number.

421642024 is a deficient number, since it is larger than the sum of its proper divisors (415441676).

421642024 is a wasteful number, since it uses less digits than its factorization.

421642024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100332 (or 3100328 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 421642024 is about 20533.9237361007. The cubic root of 421642024 is about 749.8619147263.

Adding to 421642024 its reverse (420246124), we get a palindrome (841888148).

The spelling of 421642024 in words is "four hundred twenty-one million, six hundred forty-two thousand, twenty-four".