420120402 has 32 divisors (see below), whose sum is σ = 917282688. Its totient is φ = 127495296.

The previous prime is 420120391. The next prime is 420120403. The reversal of 420120402 is 204021024.

It is not an unprimeable number, because it can be changed into a prime (420120403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31198 + ... + 42585.

It is an arithmetic number, because the mean of its divisors is an integer number (28665084).

Almost surely, 2^420120402 is an apocalyptic number.

420120402 is an abundant number, since it is smaller than the sum of its proper divisors (497162286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420120402 is a wasteful number, since it uses less digits than its factorization.

420120402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73874.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 420120402 is about 20496.8388294390. The cubic root of 420120402 is about 748.9587934096.

Adding to 420120402 its reverse (204021024), we get a palindrome (624141426).

The spelling of 420120402 in words is "four hundred twenty million, one hundred twenty thousand, four hundred two".