420020135 has 16 divisors (see below), whose sum is σ = 526556160. Its totient is φ = 321029280.

The previous prime is 420020131. The next prime is 420020149. The reversal of 420020135 is 531020024.

It is not a de Polignac number, because 420020135 - 2² = 420020131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420020131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133106 + ... + 136224.

It is an arithmetic number, because the mean of its divisors is an integer number (32909760).

Almost surely, 2^420020135 is an apocalyptic number.

420020135 is a deficient number, since it is larger than the sum of its proper divisors (106536025).

420020135 is a wasteful number, since it uses less digits than its factorization.

420020135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 420020135 is about 20494.3927697309. The cubic root of 420020135 is about 748.8992058676.

Adding to 420020135 its reverse (531020024), we get a palindrome (951040159).

The spelling of 420020135 in words is "four hundred twenty million, twenty thousand, one hundred thirty-five".