1361789 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 1119360.

The previous prime is 1361777. The next prime is 1361791. The reversal of 1361789 is 9871631.

1361789 = 77² + 78² + ... + 165².

It is not a de Polignac number, because 1361789 - 2⁸ = 1361533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12674 + ... + 12780.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1361789 is an apocalyptic number.

It is an amenable number.

1361789 is a deficient number, since it is larger than the sum of its proper divisors (271171).

1361789 is a wasteful number, since it uses less digits than its factorization.

1361789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 9072, while the sum is 35.

The square root of 1361789 is about 1166.9571543120. The cubic root of 1361789 is about 110.8417244795.

The spelling of 1361789 in words is "one million, three hundred sixty-one thousand, seven hundred eighty-nine".