1825891 has 2 divisors, whose sum is σ = 1825892. Its totient is φ = 1825890.

The previous prime is 1825883. The next prime is 1825897. The reversal of 1825891 is 1985281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1825891 - 2³ = 1825883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1825897) 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, 912945 + 912946.

It is an arithmetic number, because the mean of its divisors is an integer number (912946).

2^1825891 is an apocalyptic number.

1825891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1825891 is an equidigital number, since it uses as much as digits as its factorization.

1825891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 34.

The square root of 1825891 is about 1351.2553422651. The cubic root of 1825891 is about 122.2245037529.

The spelling of 1825891 in words is "one million, eight hundred twenty-five thousand, eight hundred ninety-one".