27401261 has 4 divisors (see below), whose sum is σ = 27850524. Its totient is φ = 26952000.

The previous prime is 27401221. The next prime is 27401267. The reversal of 27401261 is 16210472.

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 8094025 + 19307236 = 2845^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 27401261 - 2⁶ = 27401197 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 (27401267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224540 + ... + 224661.

It is an arithmetic number, because the mean of its divisors is an integer number (6962631).

Almost surely, 2^27401261 is an apocalyptic number.

It is an amenable number.

27401261 is a deficient number, since it is larger than the sum of its proper divisors (449263).

27401261 is an equidigital number, since it uses as much as digits as its factorization.

27401261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449262.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 27401261 is about 5234.6213807686. The cubic root of 27401261 is about 301.4788498833.

The spelling of 27401261 in words is "twenty-seven million, four hundred one thousand, two hundred sixty-one".