252004145 has 4 divisors (see below), whose sum is σ = 302404980. Its totient is φ = 201603312.

The previous prime is 252004139. The next prime is 252004187. The reversal of 252004145 is 541400252.

It is a happy number.

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 44528929 + 207475216 = 6673^2 + 14404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252004145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252004145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25200410 + ... + 25200419.

It is an arithmetic number, because the mean of its divisors is an integer number (75601245).

Almost surely, 2^252004145 is an apocalyptic number.

It is an amenable number.

252004145 is a deficient number, since it is larger than the sum of its proper divisors (50400835).

252004145 is an equidigital number, since it uses as much as digits as its factorization.

252004145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50400834.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 252004145 is about 15874.6384210791. The cubic root of 252004145 is about 631.6394228830.

Adding to 252004145 its reverse (541400252), we get a palindrome (793404397).

The spelling of 252004145 in words is "two hundred fifty-two million, four thousand, one hundred forty-five".