1836641 has 2 divisors, whose sum is σ = 1836642. Its totient is φ = 1836640.

The previous prime is 1836623. The next prime is 1836647. The reversal of 1836641 is 1466381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164241 + 672400 = 1079^2 + 820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1836641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1836647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 918320 + 918321.

It is an arithmetic number, because the mean of its divisors is an integer number (918321).

2^1836641 is an apocalyptic number.

It is an amenable number.

1836641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1836641 is an equidigital number, since it uses as much as digits as its factorization.

1836641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 1836641 is about 1355.2272872105. The cubic root of 1836641 is about 122.4639016223.

The spelling of 1836641 in words is "one million, eight hundred thirty-six thousand, six hundred forty-one".