252787520 has 28 divisors (see below), whose sum is σ = 601951044. Its totient is φ = 101114880.

The previous prime is 252787517. The next prime is 252787523. The reversal of 252787520 is 25787252.

It is an interprime number because it is at equal distance from previous prime (252787517) and next prime (252787523).

It can be written as a sum of positive squares in 2 ways, for example, as 162613504 + 90174016 = 12752^2 + 9496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252787523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394661 + ... + 395300.

Almost surely, 2^252787520 is an apocalyptic number.

252787520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252787520 is an abundant number, since it is smaller than the sum of its proper divisors (349163524).

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

252787520 is an equidigital number, since it uses as much as digits as its factorization.

252787520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789978 (or 789968 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 252787520 is about 15899.2930660454. The cubic root of 252787520 is about 632.2932463841.

The spelling of 252787520 in words is "two hundred fifty-two million, seven hundred eighty-seven thousand, five hundred twenty".