420042134 has 4 divisors (see below), whose sum is σ = 630063204. Its totient is φ = 210021066.

The previous prime is 420042127. The next prime is 420042193. The reversal of 420042134 is 431240024.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010532 + ... + 105010535.

It is an arithmetic number, because the mean of its divisors is an integer number (157515801).

Almost surely, 2^420042134 is an apocalyptic number.

420042134 is a deficient number, since it is larger than the sum of its proper divisors (210021070).

420042134 is a wasteful number, since it uses less digits than its factorization.

420042134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210021069.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 420042134 is about 20494.9294704812. The cubic root of 420042134 is about 748.9122804360.

Adding to 420042134 its reverse (431240024), we get a palindrome (851282158).

The spelling of 420042134 in words is "four hundred twenty million, forty-two thousand, one hundred thirty-four".