2130001 has 2 divisors, whose sum is σ = 2130002. Its totient is φ = 2130000.

The previous prime is 2129983. The next prime is 2130013. The reversal of 2130001 is 1000312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 641601 = 1220^2 + 801^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130001 - 2¹³ = 2121809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2130031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065000 + 1065001.

It is an arithmetic number, because the mean of its divisors is an integer number (1065001).

2^2130001 is an apocalyptic number.

It is an amenable number.

2130001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130001 is an equidigital number, since it uses as much as digits as its factorization.

2130001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 2130001 is about 1459.4522945270. The cubic root of 2130001 is about 128.6648552577.

Adding to 2130001 its reverse (1000312), we get a palindrome (3130313).

The spelling of 2130001 in words is "two million, one hundred thirty thousand, one".