420202504 has 8 divisors (see below), whose sum is σ = 787879710. Its totient is φ = 210101248.

The previous prime is 420202463. The next prime is 420202507. The reversal of 420202504 is 405202024.

It can be written as a sum of positive squares in only one way, i.e., 419840100 + 362404 = 20490^2 + 602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (420202507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26262649 + ... + 26262664.

Almost surely, 2^420202504 is an apocalyptic number.

It is an amenable number.

420202504 is a deficient number, since it is larger than the sum of its proper divisors (367677206).

420202504 is a wasteful number, since it uses less digits than its factorization.

420202504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52525319 (or 52525315 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 420202504 is about 20498.8415282425. The cubic root of 420202504 is about 749.0075786383.

Adding to 420202504 its reverse (405202024), we get a palindrome (825404528).

The spelling of 420202504 in words is "four hundred twenty million, two hundred two thousand, five hundred four".