252435405 has 16 divisors (see below), whose sum is σ = 404343360. Its totient is φ = 134483328.

The previous prime is 252435361. The next prime is 252435437. The reversal of 252435405 is 504534252.

It is not a de Polignac number, because 252435405 - 2⁷ = 252435277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5466 + ... + 23124.

It is an arithmetic number, because the mean of its divisors is an integer number (25271460).

Almost surely, 2^252435405 is an apocalyptic number.

It is an amenable number.

252435405 is a deficient number, since it is larger than the sum of its proper divisors (151907955).

252435405 is a wasteful number, since it uses less digits than its factorization.

252435405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18620.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 252435405 is about 15888.2159162066. The cubic root of 252435405 is about 631.9995301564. Note that the first 3 decimals are identical.

Adding to 252435405 its reverse (504534252), we get a palindrome (756969657).

The spelling of 252435405 in words is "two hundred fifty-two million, four hundred thirty-five thousand, four hundred five".