27012001 has 4 divisors (see below), whose sum is σ = 27024004. Its totient is φ = 27000000.

The previous prime is 27011987. The next prime is 27012017. The reversal of 27012001 is 10021072.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9363600 + 17648401 = 3060^2 + 4201^2 .

It is a 3-Lehmer number, since φ(27012001) divides (27012001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 27012001 - 2⁵ = 27011969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27016001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (6756001).

Almost surely, 2^27012001 is an apocalyptic number.

27012001 is the 3001-st octagonal number.

It is an amenable number.

27012001 is a deficient number, since it is larger than the sum of its proper divisors (12003).

27012001 is an equidigital number, since it uses as much as digits as its factorization.

27012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12002.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 27012001 is about 5197.3070911771. The cubic root of 27012001 is about 300.0444415643.

Adding to 27012001 its reverse (10021072), we get a palindrome (37033073).

The spelling of 27012001 in words is "twenty-seven million, twelve thousand, one".