252006145 has 4 divisors (see below), whose sum is σ = 302407380. Its totient is φ = 201604912.

The previous prime is 252006121. The next prime is 252006163. The reversal of 252006145 is 541600252.

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 166332609 + 85673536 = 12897^2 + 9256^2 .

It is a cyclic number.

It is not a de Polignac number, because 252006145 - 2⁷ = 252006017 is a prime.

It is a super-2 number, since 2×252006145² = 127014194235522050, which contains 22 as substring.

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, 25200610 + ... + 25200619.

It is an arithmetic number, because the mean of its divisors is an integer number (75601845).

Almost surely, 2^252006145 is an apocalyptic number.

It is an amenable number.

252006145 is a deficient number, since it is larger than the sum of its proper divisors (50401235).

252006145 is an equidigital number, since it uses as much as digits as its factorization.

252006145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50401234.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 252006145 is about 15874.7014145149. The cubic root of 252006145 is about 631.6410938548.

Adding to 252006145 its reverse (541600252), we get a palindrome (793606397).

The spelling of 252006145 in words is "two hundred fifty-two million, six thousand, one hundred forty-five".