1365109 has 2 divisors, whose sum is σ = 1365110. Its totient is φ = 1365108.

The previous prime is 1365107. The next prime is 1365127. The reversal of 1365109 is 9015631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 88209 = 1130^2 + 297^2 .

It is an emirp because it is prime and its reverse (9015631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1365109 - 2¹ = 1365107 is a prime.

Together with 1365107, it forms a pair of twin primes.

1365109 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1365103) 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, 682554 + 682555.

It is an arithmetic number, because the mean of its divisors is an integer number (682555).

2^1365109 is an apocalyptic number.

It is an amenable number.

1365109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365109 is an equidigital number, since it uses as much as digits as its factorization.

1365109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1365109 is about 1168.3787913173. The cubic root of 1365109 is about 110.9317276240.

It can be divided in two parts, 1365 and 109, that multiplied together give a triangular number (148785 = T₅₄₅).

The spelling of 1365109 in words is "one million, three hundred sixty-five thousand, one hundred nine".