252120005 has 4 divisors (see below), whose sum is σ = 302544012. Its totient is φ = 201696000.

The previous prime is 252119977. The next prime is 252120049. The reversal of 252120005 is 500021252.

252120005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79959364 + 172160641 = 8942^2 + 13121^2 .

It is not a de Polignac number, because 252120005 - 2⁶ = 252119941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25211996 + ... + 25212005.

It is an arithmetic number, because the mean of its divisors is an integer number (75636003).

Almost surely, 2^252120005 is an apocalyptic number.

It is an amenable number.

252120005 is a deficient number, since it is larger than the sum of its proper divisors (50424007).

252120005 is an equidigital number, since it uses as much as digits as its factorization.

252120005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50424006.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 252120005 is about 15878.2872187147. The cubic root of 252120005 is about 631.7362077079.

Adding to 252120005 its reverse (500021252), we get a palindrome (752141257).

The spelling of 252120005 in words is "two hundred fifty-two million, one hundred twenty thousand, five".