1840541 has 2 divisors, whose sum is σ = 1840542. Its totient is φ = 1840540.

The previous prime is 1840537. The next prime is 1840561. The reversal of 1840541 is 1450481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1833316 + 7225 = 1354^2 + 85^2 .

It is an emirp because it is prime and its reverse (1450481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1840541 - 2² = 1840537 is a prime.

It is a super-3 number, since 3×1840541³ = 18705001333672381263, which contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1840561) 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, 920270 + 920271.

It is an arithmetic number, because the mean of its divisors is an integer number (920271).

2^1840541 is an apocalyptic number.

It is an amenable number.

1840541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840541 is an equidigital number, since it uses as much as digits as its factorization.

1840541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1840541 is about 1356.6653972148. The cubic root of 1840541 is about 122.5505219900.

The spelling of 1840541 in words is "one million, eight hundred forty thousand, five hundred forty-one".