252810540 has 36 divisors (see below), whose sum is σ = 766859184. Its totient is φ = 67416096.

The previous prime is 252810539. The next prime is 252810541. The reversal of 252810540 is 45018252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (252810539) and next prime (252810541).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (252810541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 702072 + ... + 702431.

It is an arithmetic number, because the mean of its divisors is an integer number (21301644).

Almost surely, 2^252810540 is an apocalyptic number.

252810540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252810540 is an abundant number, since it is smaller than the sum of its proper divisors (514048644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252810540 is a wasteful number, since it uses less digits than its factorization.

252810540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404518 (or 1404513 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 252810540 is about 15900.0169811230. The cubic root of 252810540 is about 632.3124389834.

Adding to 252810540 its reverse (45018252), we get a palindrome (297828792).

The spelling of 252810540 in words is "two hundred fifty-two million, eight hundred ten thousand, five hundred forty".