1845491 has 2 divisors, whose sum is σ = 1845492. Its totient is φ = 1845490.

The previous prime is 1845463. The next prime is 1845499. The reversal of 1845491 is 1945481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1845491 - 2⁶ = 1845427 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1845499) 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, 922745 + 922746.

It is an arithmetic number, because the mean of its divisors is an integer number (922746).

2^1845491 is an apocalyptic number.

1845491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1845491 is an equidigital number, since it uses as much as digits as its factorization.

1845491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 1845491 is about 1358.4884982951. The cubic root of 1845491 is about 122.6602871932.

The spelling of 1845491 in words is "one million, eight hundred forty-five thousand, four hundred ninety-one".