1984641 has 4 divisors (see below), whose sum is σ = 2646192. Its totient is φ = 1323092.

The previous prime is 1984639. The next prime is 1984649. The reversal of 1984641 is 1464891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1984641 - 2¹ = 1984639 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1984649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330771 + ... + 330776.

It is an arithmetic number, because the mean of its divisors is an integer number (661548).

2^1984641 is an apocalyptic number.

It is an amenable number.

1984641 is a deficient number, since it is larger than the sum of its proper divisors (661551).

1984641 is an equidigital number, since it uses as much as digits as its factorization.

1984641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661550.

The product of its digits is 6912, while the sum is 33.

The square root of 1984641 is about 1408.7728702669. The cubic root of 1984641 is about 125.6687570646.

The spelling of 1984641 in words is "one million, nine hundred eighty-four thousand, six hundred forty-one".