234252405 has 20 divisors (see below), whose sum is σ = 419919852. Its totient is φ = 124934400.

The previous prime is 234252373. The next prime is 234252409. The reversal of 234252405 is 504252432.

It is a happy number.

234252405 is a `hidden beast` number, since 2 + 3 + 4 + 252 + 405 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 154703844 + 79548561 = 12438^2 + 8919^2 .

It is not a de Polignac number, because 234252405 - 2⁵ = 234252373 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 (234252409) 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 19 ways as a sum of consecutive naturals, for example, 288796 + ... + 289605.

Almost surely, 2^234252405 is an apocalyptic number.

It is an amenable number.

234252405 is a deficient number, since it is larger than the sum of its proper divisors (185667447).

234252405 is an equidigital number, since it uses as much as digits as its factorization.

234252405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578418 (or 578409 counting only the distinct ones).

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

The square root of 234252405 is about 15305.3064327376. The cubic root of 234252405 is about 616.4454992935.

Adding to 234252405 its sum of digits (27), we get a palindrome (234252432).

The spelling of 234252405 in words is "two hundred thirty-four million, two hundred fifty-two thousand, four hundred five".