252666261 has 12 divisors (see below), whose sum is σ = 371148960. Its totient is φ = 165588840.

The previous prime is 252666221. The next prime is 252666287. The reversal of 252666261 is 162666252.

It is not a de Polignac number, because 252666261 - 2⁷ = 252666133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252666221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237385 + ... + 238446.

It is an arithmetic number, because the mean of its divisors is an integer number (30929080).

Almost surely, 2^252666261 is an apocalyptic number.

It is an amenable number.

252666261 is a deficient number, since it is larger than the sum of its proper divisors (118482699).

252666261 is a wasteful number, since it uses less digits than its factorization.

252666261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475896 (or 475893 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 252666261 is about 15895.4792629854. The cubic root of 252666261 is about 632.1921291699.

Subtracting from 252666261 its reverse (162666252), we obtain a palindrome (90000009).

The spelling of 252666261 in words is "two hundred fifty-two million, six hundred sixty-six thousand, two hundred sixty-one".