420235142 has 8 divisors (see below), whose sum is σ = 637947576. Its totient is φ = 207585952.

The previous prime is 420235133. The next prime is 420235147. The reversal of 420235142 is 241532024.

420235142 = 2209² + 2210² + ... + 2291².

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420235147) 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, 1265603 + ... + 1265934.

It is an arithmetic number, because the mean of its divisors is an integer number (79743447).

Almost surely, 2^420235142 is an apocalyptic number.

420235142 is a deficient number, since it is larger than the sum of its proper divisors (217712434).

420235142 is a wasteful number, since it uses less digits than its factorization.

420235142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531622.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 420235142 is about 20499.6376065530. The cubic root of 420235142 is about 749.0269704602.

Adding to 420235142 its reverse (241532024), we get a palindrome (661767166).

The spelling of 420235142 in words is "four hundred twenty million, two hundred thirty-five thousand, one hundred forty-two".