405210252 has 12 divisors (see below), whose sum is σ = 945490616. Its totient is φ = 135070080.

The previous prime is 405210229. The next prime is 405210263. The reversal of 405210252 is 252012504.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16883749 + ... + 16883772.

Almost surely, 2^405210252 is an apocalyptic number.

It is an amenable number.

405210252 is an abundant number, since it is smaller than the sum of its proper divisors (540280364).

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

405210252 is a wasteful number, since it uses less digits than its factorization.

405210252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33767528 (or 33767526 counting only the distinct ones).

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

The square root of 405210252 is about 20129.8348726461. The cubic root of 405210252 is about 739.9916312664.

Adding to 405210252 its reverse (252012504), we get a palindrome (657222756).

The spelling of 405210252 in words is "four hundred five million, two hundred ten thousand, two hundred fifty-two".