420100042 has 16 divisors (see below), whose sum is σ = 641865600. Its totient is φ = 206171280.

The previous prime is 420100019. The next prime is 420100049. The reversal of 420100042 is 240001024.

It is a junction number, because it is equal to n+sod(n) for n = 420099995 and 420100031.

It is not an unprimeable number, because it can be changed into a prime (420100049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26059 + ... + 38977.

It is an arithmetic number, because the mean of its divisors is an integer number (40116600).

Almost surely, 2^420100042 is an apocalyptic number.

420100042 is a deficient number, since it is larger than the sum of its proper divisors (221765558).

420100042 is a wasteful number, since it uses less digits than its factorization.

420100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13221.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 420100042 is about 20496.3421614687. The cubic root of 420100042 is about 748.9466944595.

Adding to 420100042 its reverse (240001024), we get a palindrome (660101066).

The spelling of 420100042 in words is "four hundred twenty million, one hundred thousand, forty-two".