420423522 has 16 divisors (see below), whose sum is σ = 844553952. Its totient is φ = 139523360.

The previous prime is 420423503. The next prime is 420423533. The reversal of 420423522 is 225324024.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 420423492 and 420423501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152979 + ... + 155702.

It is an arithmetic number, because the mean of its divisors is an integer number (52784622).

Almost surely, 2^420423522 is an apocalyptic number.

420423522 is an abundant number, since it is smaller than the sum of its proper divisors (424130430).

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

420423522 is a wasteful number, since it uses less digits than its factorization.

420423522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308913.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 420423522 is about 20504.2318071173. The cubic root of 420423522 is about 749.1388765558.

Adding to 420423522 its reverse (225324024), we get a palindrome (645747546).

The spelling of 420423522 in words is "four hundred twenty million, four hundred twenty-three thousand, five hundred twenty-two".