420542452 has 12 divisors (see below), whose sum is σ = 802853856. Its totient is φ = 191155640.

The previous prime is 420542449. The next prime is 420542467. The reversal of 420542452 is 254245024.

It is a self number, because there is not a number n which added to its sum of digits gives 420542452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778848 + ... + 4778935.

It is an arithmetic number, because the mean of its divisors is an integer number (66904488).

Almost surely, 2^420542452 is an apocalyptic number.

It is an amenable number.

420542452 is a deficient number, since it is larger than the sum of its proper divisors (382311404).

420542452 is a wasteful number, since it uses less digits than its factorization.

420542452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557798 (or 9557796 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 420542452 is about 20507.1317350818. The cubic root of 420542452 is about 749.2095090507.

Adding to 420542452 its reverse (254245024), we get a palindrome (674787476).

The spelling of 420542452 in words is "four hundred twenty million, five hundred forty-two thousand, four hundred fifty-two".