1884721 has 2 divisors, whose sum is σ = 1884722. Its totient is φ = 1884720.

The previous prime is 1884713. The next prime is 1884731. The reversal of 1884721 is 1274881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852321 + 32400 = 1361^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1884721 - 2³ = 1884713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1884731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 942360 + 942361.

It is an arithmetic number, because the mean of its divisors is an integer number (942361).

2^1884721 is an apocalyptic number.

It is an amenable number.

1884721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1884721 is an equidigital number, since it uses as much as digits as its factorization.

1884721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 31.

The square root of 1884721 is about 1372.8514122075. The cubic root of 1884721 is about 123.5233391395.

The spelling of 1884721 in words is "one million, eight hundred eighty-four thousand, seven hundred twenty-one".