2141891 has 2 divisors, whose sum is σ = 2141892. Its totient is φ = 2141890.

The previous prime is 2141879. The next prime is 2141897. The reversal of 2141891 is 1981412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2141891 - 2⁶ = 2141827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2141891.

It is not a weakly prime, because it can be changed into another prime (2141897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070945 + 1070946.

It is an arithmetic number, because the mean of its divisors is an integer number (1070946).

2^2141891 is an apocalyptic number.

2141891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141891 is an equidigital number, since it uses as much as digits as its factorization.

2141891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The square root of 2141891 is about 1463.5200716082. The cubic root of 2141891 is about 128.9038203019.

The spelling of 2141891 in words is "two million, one hundred forty-one thousand, eight hundred ninety-one".