252423405 has 32 divisors (see below), whose sum is σ = 483275520. Its totient is φ = 124269120.

The previous prime is 252423403. The next prime is 252423419. The reversal of 252423405 is 504324252.

It is a happy number.

252423405 is a `hidden beast` number, since 252 + 4 + 2 + 3 + 405 = 666.

It is not a de Polignac number, because 252423405 - 2¹ = 252423403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252423403) 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 31 ways as a sum of consecutive naturals, for example, 70161 + ... + 73670.

It is an arithmetic number, because the mean of its divisors is an integer number (15102360).

Almost surely, 2^252423405 is an apocalyptic number.

It is an amenable number.

252423405 is a deficient number, since it is larger than the sum of its proper divisors (230852115).

252423405 is a wasteful number, since it uses less digits than its factorization.

252423405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143858 (or 143852 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 252423405 is about 15887.8382733461. The cubic root of 252423405 is about 631.9895155621.

Adding to 252423405 its reverse (504324252), we get a palindrome (756747657).

The spelling of 252423405 in words is "two hundred fifty-two million, four hundred twenty-three thousand, four hundred five".