1361803 has 2 divisors, whose sum is σ = 1361804. Its totient is φ = 1361802.

The previous prime is 1361791. The next prime is 1361809. The reversal of 1361803 is 3081631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361803 - 2⁹ = 1361291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361809) 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, 680901 + 680902.

It is an arithmetic number, because the mean of its divisors is an integer number (680902).

2^1361803 is an apocalyptic number.

1361803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361803 is an equidigital number, since it uses as much as digits as its factorization.

1361803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1361803 is about 1166.9631528030. The cubic root of 1361803 is about 110.8421043178.

It can be divided in two parts, 13 and 61803, that added together give a palindrome (61816).

The spelling of 1361803 in words is "one million, three hundred sixty-one thousand, eight hundred three".