2160001 has 2 divisors, whose sum is σ = 2160002. Its totient is φ = 2160000.

The previous prime is 2159959. The next prime is 2160017. The reversal of 2160001 is 1000612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 456976 = 1305^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 2160001 - 2¹⁹ = 1635713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2160001.

It is not a weakly prime, because it can be changed into another prime (2160031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080000 + 1080001.

It is an arithmetic number, because the mean of its divisors is an integer number (1080001).

2^2160001 is an apocalyptic number.

It is an amenable number.

2160001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2160001 is an equidigital number, since it uses as much as digits as its factorization.

2160001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2160001 is about 1469.6941858768. The cubic root of 2160001 is about 129.2661013504.

Adding to 2160001 its reverse (1000612), we get a palindrome (3160613).

The spelling of 2160001 in words is "two million, one hundred sixty thousand, one".