421500052 has 6 divisors (see below), whose sum is σ = 737625098. Its totient is φ = 210750024.

The previous prime is 421500031. The next prime is 421500103. The reversal of 421500052 is 250005124.

It can be written as a sum of positive squares in only one way, i.e., 322417936 + 99082116 = 17956^2 + 9954^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52687503 + ... + 52687510.

Almost surely, 2^421500052 is an apocalyptic number.

It is an amenable number.

421500052 is a deficient number, since it is larger than the sum of its proper divisors (316125046).

421500052 is a wasteful number, since it uses less digits than its factorization.

421500052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105375017 (or 105375015 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 421500052 is about 20530.4664340584. The cubic root of 421500052 is about 749.7777427347. Note that the first 4 decimals are identical.

Adding to 421500052 its reverse (250005124), we get a palindrome (671505176).

The spelling of 421500052 in words is "four hundred twenty-one million, five hundred thousand, fifty-two".