1803541 has 2 divisors, whose sum is σ = 1803542. Its totient is φ = 1803540.

The previous prime is 1803533. The next prime is 1803551. The reversal of 1803541 is 1453081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 21316 = 1335^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 1803541 - 2³ = 1803533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1803511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901770 + 901771.

It is an arithmetic number, because the mean of its divisors is an integer number (901771).

2^1803541 is an apocalyptic number.

It is an amenable number.

1803541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1803541 is an equidigital number, since it uses as much as digits as its factorization.

1803541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1803541 is about 1342.9597909096. The cubic root of 1803541 is about 121.7237546150.

It can be divided in two parts, 180 and 3541, that added together give a square (3721 = 61²).

The spelling of 1803541 in words is "one million, eight hundred three thousand, five hundred forty-one".