252780529 has 2 divisors, whose sum is σ = 252780530. Its totient is φ = 252780528.

The previous prime is 252780527. The next prime is 252780533. The reversal of 252780529 is 925087252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228010000 + 24770529 = 15100^2 + 4977^2 .

It is a cyclic number.

It is not a de Polignac number, because 252780529 - 2¹ = 252780527 is a prime.

Together with 252780527, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 252780491 and 252780500.

It is not a weakly prime, because it can be changed into another prime (252780527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126390264 + 126390265.

It is an arithmetic number, because the mean of its divisors is an integer number (126390265).

Almost surely, 2^252780529 is an apocalyptic number.

It is an amenable number.

252780529 is a deficient number, since it is larger than the sum of its proper divisors (1).

252780529 is an equidigital number, since it uses as much as digits as its factorization.

252780529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 252780529 is about 15899.0732119831. The cubic root of 252780529 is about 632.2874175061.

The spelling of 252780529 in words is "two hundred fifty-two million, seven hundred eighty thousand, five hundred twenty-nine".