27261001 has 2 divisors, whose sum is σ = 27261002. Its totient is φ = 27261000.

The previous prime is 27260999. The next prime is 27261007. The reversal of 27261001 is 10016272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 12638025 = 3824^2 + 3555^2 .

It is a cyclic number.

It is not a de Polignac number, because 27261001 - 2¹ = 27260999 is a prime.

Together with 27260999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27261001.

It is not a weakly prime, because it can be changed into another prime (27261007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13630500 + 13630501.

It is an arithmetic number, because the mean of its divisors is an integer number (13630501).

Almost surely, 2^27261001 is an apocalyptic number.

It is an amenable number.

27261001 is a deficient number, since it is larger than the sum of its proper divisors (1).

27261001 is an equidigital number, since it uses as much as digits as its factorization.

27261001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 27261001 is about 5221.2068528263. The cubic root of 27261001 is about 300.9635721525.

Adding to 27261001 its reverse (10016272), we get a palindrome (37277273).

The spelling of 27261001 in words is "twenty-seven million, two hundred sixty-one thousand, one".