252641261 has 2 divisors, whose sum is σ = 252641262. Its totient is φ = 252641260.

The previous prime is 252641251. The next prime is 252641287. The reversal of 252641261 is 162146252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222457225 + 30184036 = 14915^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 252641261 - 2⁶ = 252641197 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 (252641251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126320630 + 126320631.

It is an arithmetic number, because the mean of its divisors is an integer number (126320631).

Almost surely, 2^252641261 is an apocalyptic number.

It is an amenable number.

252641261 is a deficient number, since it is larger than the sum of its proper divisors (1).

252641261 is an equidigital number, since it uses as much as digits as its factorization.

252641261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 252641261 is about 15894.6928564222. The cubic root of 252641261 is about 632.1712777848.

The spelling of 252641261 in words is "two hundred fifty-two million, six hundred forty-one thousand, two hundred sixty-one".