2143901 has 2 divisors, whose sum is σ = 2143902. Its totient is φ = 2143900.

The previous prime is 2143877. The next prime is 2143909. The reversal of 2143901 is 1093412.

2143901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1378276 + 765625 = 1174^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143901 - 2⁶ = 2143837 is a prime.

It is a super-2 number, since 2×2143901² = 9192622995602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071950 + 1071951.

It is an arithmetic number, because the mean of its divisors is an integer number (1071951).

2^2143901 is an apocalyptic number.

It is an amenable number.

2143901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143901 is an equidigital number, since it uses as much as digits as its factorization.

2143901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2143901 is about 1464.2066111038. The cubic root of 2143901 is about 128.9441298031.

The spelling of 2143901 in words is "two million, one hundred forty-three thousand, nine hundred one".