420134242 has 8 divisors (see below), whose sum is σ = 687492432. Its totient is φ = 190970100.

The previous prime is 420134189. The next prime is 420134249. The reversal of 420134242 is 242431024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 19097011 = 420134242 / (4 + 2 + 0 + 1 + 3 + 4 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (420134249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548484 + ... + 9548527.

It is an arithmetic number, because the mean of its divisors is an integer number (85936554).

Almost surely, 2^420134242 is an apocalyptic number.

420134242 is a deficient number, since it is larger than the sum of its proper divisors (267358190).

420134242 is a wasteful number, since it uses less digits than its factorization.

420134242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19097024.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420134242 is about 20497.1764396953. The cubic root of 420134242 is about 748.9670176201.

Adding to 420134242 its reverse (242431024), we get a palindrome (662565266).

The spelling of 420134242 in words is "four hundred twenty million, one hundred thirty-four thousand, two hundred forty-two".