405135252 has 36 divisors (see below), whose sum is σ = 1077993280. Its totient is φ = 127937232.

The previous prime is 405135223. The next prime is 405135281. The reversal of 405135252 is 252531504.

It is a happy number.

405135252 is a `hidden beast` number, since 405 + 1 + 3 + 5 + 252 = 666.

It is an interprime number because it is at equal distance from previous prime (405135223) and next prime (405135281).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295468 + ... + 296835.

Almost surely, 2^405135252 is an apocalyptic number.

It is an amenable number.

405135252 is an abundant number, since it is smaller than the sum of its proper divisors (672858028).

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

405135252 is a wasteful number, since it uses less digits than its factorization.

405135252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592332 (or 592327 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 405135252 is about 20127.9718799486. The cubic root of 405135252 is about 739.9459736549.

Adding to 405135252 its reverse (252531504), we get a palindrome (657666756).

The spelling of 405135252 in words is "four hundred five million, one hundred thirty-five thousand, two hundred fifty-two".