254668261 has 4 divisors (see below), whose sum is σ = 260879724. Its totient is φ = 248456800.

The previous prime is 254668241. The next prime is 254668307. The reversal of 254668261 is 162866452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82901025 + 171767236 = 9105^2 + 13106^2 .

It is a cyclic number.

It is not a de Polignac number, because 254668261 - 2¹³ = 254660069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254668201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3105670 + ... + 3105751.

It is an arithmetic number, because the mean of its divisors is an integer number (65219931).

Almost surely, 2^254668261 is an apocalyptic number.

It is an amenable number.

254668261 is a deficient number, since it is larger than the sum of its proper divisors (6211463).

254668261 is an equidigital number, since it uses as much as digits as its factorization.

254668261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211462.

The product of its digits is 138240, while the sum is 40.

The square root of 254668261 is about 15958.3288912091. The cubic root of 254668261 is about 633.8574623093.

It can be divided in two parts, 2546 and 68261, that added together give a palindrome (70807).

The spelling of 254668261 in words is "two hundred fifty-four million, six hundred sixty-eight thousand, two hundred sixty-one".