27481001 has 2 divisors, whose sum is σ = 27481002. Its totient is φ = 27481000.

The previous prime is 27480997. The next prime is 27481007. The reversal of 27481001 is 10018472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23775376 + 3705625 = 4876^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 27481001 - 2² = 27480997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27481007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13740500 + 13740501.

It is an arithmetic number, because the mean of its divisors is an integer number (13740501).

Almost surely, 2^27481001 is an apocalyptic number.

It is an amenable number.

27481001 is a deficient number, since it is larger than the sum of its proper divisors (1).

27481001 is an equidigital number, since it uses as much as digits as its factorization.

27481001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 27481001 is about 5242.2324442932. The cubic root of 27481001 is about 301.7710096943.

Adding to 27481001 its reverse (10018472), we get a palindrome (37499473).

The spelling of 27481001 in words is "twenty-seven million, four hundred eighty-one thousand, one".