1838521 has 2 divisors, whose sum is σ = 1838522. Its totient is φ = 1838520.

The previous prime is 1838519. The next prime is 1838527. The reversal of 1838521 is 1258381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 746496 = 1045^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838521 - 2¹ = 1838519 is a prime.

Together with 1838519, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

1838521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1838521.

It is not a weakly prime, because it can be changed into another prime (1838527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919260 + 919261.

It is an arithmetic number, because the mean of its divisors is an integer number (919261).

2^1838521 is an apocalyptic number.

It is an amenable number.

1838521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838521 is an equidigital number, since it uses as much as digits as its factorization.

1838521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 1838521 is about 1355.9207203963. The cubic root of 1838521 is about 122.5056723737.

The spelling of 1838521 in words is "one million, eight hundred thirty-eight thousand, five hundred twenty-one".