421002552 has 32 divisors (see below), whose sum is σ = 1114419600. Its totient is φ = 132079104.

The previous prime is 421002529. The next prime is 421002559. The reversal of 421002552 is 255200124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421002559) 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 7 ways as a sum of consecutive naturals, for example, 515527 + ... + 516342.

Almost surely, 2^421002552 is an apocalyptic number.

It is an amenable number.

421002552 is an abundant number, since it is smaller than the sum of its proper divisors (693417048).

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

421002552 is a wasteful number, since it uses less digits than its factorization.

421002552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031895 (or 1031891 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 421002552 is about 20518.3467170238. The cubic root of 421002552 is about 749.4826369738.

Adding to 421002552 its reverse (255200124), we get a palindrome (676202676).

The spelling of 421002552 in words is "four hundred twenty-one million, two thousand, five hundred fifty-two".