2142001 has 2 divisors, whose sum is σ = 2142002.
Its totient is φ = 2142000.
The previous prime is 2141987. The next prime is 2142029. The reversal of 2142001 is 1002412.
Adding to 2142001 its reverse (1002412), we get a palindrome (3144413).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1288225 + 853776 = 1135^2 + 924^2
It is a cyclic number.
It is not a de Polignac number, because 2142001 - 211 = 2139953 is a prime.
It is not a weakly prime, because it can be changed into another prime (2142061) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071000 + 1071001.
It is an arithmetic number, because the mean of its divisors is an integer number (1071001).
22142001 is an apocalyptic number.
It is an amenable number.
2142001 is a deficient number, since it is larger than the sum of its proper divisors (1).
2142001 is an equidigital number, since it uses as much as digits as its factorization.
2142001 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 16, while the sum is 10.
The square root of 2142001 is about 1463.5576517514.
The cubic root of 2142001 is about 128.9060269467.
The spelling of 2142001 in words is "two million, one hundred forty-two thousand, one".