1914821 has 2 divisors, whose sum is σ = 1914822. Its totient is φ = 1914820.

The previous prime is 1914817. The next prime is 1914853. The reversal of 1914821 is 1284191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852321 + 62500 = 1361^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1914821 - 2² = 1914817 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1914811) 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, 957410 + 957411.

It is an arithmetic number, because the mean of its divisors is an integer number (957411).

2^1914821 is an apocalyptic number.

It is an amenable number.

1914821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1914821 is an equidigital number, since it uses as much as digits as its factorization.

1914821 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1914821 is about 1383.7705734695. The cubic root of 1914821 is about 124.1774471269.

The spelling of 1914821 in words is "one million, nine hundred fourteen thousand, eight hundred twenty-one".