420002164 has 6 divisors (see below), whose sum is σ = 735003794. Its totient is φ = 210001080.

The previous prime is 420002123. The next prime is 420002171. The reversal of 420002164 is 461200024.

It can be written as a sum of positive squares in only one way, i.e., 411765264 + 8236900 = 20292^2 + 2870^2 .

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, 52500267 + ... + 52500274.

Almost surely, 2^420002164 is an apocalyptic number.

It is an amenable number.

420002164 is a deficient number, since it is larger than the sum of its proper divisors (315001630).

420002164 is a wasteful number, since it uses less digits than its factorization.

420002164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105000545 (or 105000543 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 420002164 is about 20493.9543280451. The cubic root of 420002164 is about 748.8885249038. Note that the first 3 decimals are identical.

Adding to 420002164 its reverse (461200024), we get a palindrome (881202188).

The spelling of 420002164 in words is "four hundred twenty million, two thousand, one hundred sixty-four".