1984261 has 2 divisors, whose sum is σ = 1984262. Its totient is φ = 1984260.

The previous prime is 1984259. The next prime is 1984271. The reversal of 1984261 is 1624891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 93636 = 1375^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984261 - 2¹ = 1984259 is a prime.

It is a super-2 number, since 2×1984261² = 7874583432242, which contains 22 as substring.

Together with 1984259, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992130 + 992131.

It is an arithmetic number, because the mean of its divisors is an integer number (992131).

2^1984261 is an apocalyptic number.

It is an amenable number.

1984261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984261 is an equidigital number, since it uses as much as digits as its factorization.

1984261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 1984261 is about 1408.6379946601. The cubic root of 1984261 is about 125.6607359371.

The spelling of 1984261 in words is "one million, nine hundred eighty-four thousand, two hundred sixty-one".