420405424 has 10 divisors (see below), whose sum is σ = 814535540. Its totient is φ = 210202704.

The previous prime is 420405383. The next prime is 420405443. The reversal of 420405424 is 424504024.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13137654 + ... + 13137685.

It is an arithmetic number, because the mean of its divisors is an integer number (81453554).

Almost surely, 2^420405424 is an apocalyptic number.

It is an amenable number.

420405424 is a deficient number, since it is larger than the sum of its proper divisors (394130116).

420405424 is a wasteful number, since it uses less digits than its factorization.

420405424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26275347 (or 26275341 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 420405424 is about 20503.7904788359. The cubic root of 420405424 is about 749.1281269908.

Adding to 420405424 its reverse (424504024), we get a palindrome (844909448).

The spelling of 420405424 in words is "four hundred twenty million, four hundred five thousand, four hundred twenty-four".