1897141 has 2 divisors, whose sum is σ = 1897142. Its totient is φ = 1897140.

The previous prime is 1897139. The next prime is 1897163. The reversal of 1897141 is 1417981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1745041 + 152100 = 1321^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897141 - 2¹ = 1897139 is a prime.

Together with 1897139, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948570 + 948571.

It is an arithmetic number, because the mean of its divisors is an integer number (948571).

2^1897141 is an apocalyptic number.

It is an amenable number.

1897141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897141 is an equidigital number, since it uses as much as digits as its factorization.

1897141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 1897141 is about 1377.3674164870. The cubic root of 1897141 is about 123.7940780981.

The spelling of 1897141 in words is "one million, eight hundred ninety-seven thousand, one hundred forty-one".