252405123434 has 16 divisors (see below), whose sum is σ = 414702131400. Its totient is φ = 114683057664.

The previous prime is 252405123427. The next prime is 252405123479. The reversal of 252405123434 is 434321504252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 251998980025 + 406143409 = 501995^2 + 20153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 252405123394 and 252405123403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127993499 + ... + 127995470.

Almost surely, 2^252405123434 is an apocalyptic number.

252405123434 is a deficient number, since it is larger than the sum of its proper divisors (162297007966).

252405123434 is a wasteful number, since it uses less digits than its factorization.

252405123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255989017.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 252405123434 its reverse (434321504252), we get a palindrome (686726627686).

The spelling of 252405123434 in words is "two hundred fifty-two billion, four hundred five million, one hundred twenty-three thousand, four hundred thirty-four".