252780061 has 2 divisors, whose sum is σ = 252780062. Its totient is φ = 252780060.

The previous prime is 252780049. The next prime is 252780103. The reversal of 252780061 is 160087252.

252780061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209351961 + 43428100 = 14469^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 252780061 - 2¹¹ = 252778013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252780001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126390030 + 126390031.

It is an arithmetic number, because the mean of its divisors is an integer number (126390031).

Almost surely, 2^252780061 is an apocalyptic number.

It is an amenable number.

252780061 is a deficient number, since it is larger than the sum of its proper divisors (1).

252780061 is an equidigital number, since it uses as much as digits as its factorization.

252780061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 252780061 is about 15899.0584941373. The cubic root of 252780061 is about 632.2870272985.

The spelling of 252780061 in words is "two hundred fifty-two million, seven hundred eighty thousand, sixty-one".