252078845 has 4 divisors (see below), whose sum is σ = 302494620. Its totient is φ = 201663072.

The previous prime is 252078829. The next prime is 252078859. The reversal of 252078845 is 548870252.

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 149279524 + 102799321 = 12218^2 + 10139^2 .

It is a cyclic number.

It is not a de Polignac number, because 252078845 - 2⁴ = 252078829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25207880 + ... + 25207889.

It is an arithmetic number, because the mean of its divisors is an integer number (75623655).

Almost surely, 2^252078845 is an apocalyptic number.

It is an amenable number.

252078845 is a deficient number, since it is larger than the sum of its proper divisors (50415775).

252078845 is an equidigital number, since it uses as much as digits as its factorization.

252078845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50415774.

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 252078845 is about 15876.9910562424. The cubic root of 252078845 is about 631.7018276813.

The spelling of 252078845 in words is "two hundred fifty-two million, seventy-eight thousand, eight hundred forty-five".