1801403 has 2 divisors, whose sum is σ = 1801404. Its totient is φ = 1801402.

The previous prime is 1801363. The next prime is 1801411. The reversal of 1801403 is 3041081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1801403 - 2⁶ = 1801339 is a prime.

It is equal to p₁₃₅₁₇₀ and since 1801403 and 135170 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1801433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900701 + 900702.

It is an arithmetic number, because the mean of its divisors is an integer number (900702).

2^1801403 is an apocalyptic number.

1801403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801403 is an equidigital number, since it uses as much as digits as its factorization.

1801403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1801403 is about 1342.1635518818. The cubic root of 1801403 is about 121.6756366273.

Adding to 1801403 its reverse (3041081), we get a palindrome (4842484).

The spelling of 1801403 in words is "one million, eight hundred one thousand, four hundred three".