1367865 has 24 divisors (see below), whose sum is σ = 2400840. Its totient is φ = 720384.

The previous prime is 1367857. The next prime is 1367869. The reversal of 1367865 is 5687631.

It can be written as a sum of positive squares in 4 ways, for example, as 95481 + 1272384 = 309^2 + 1128^2 .

It is not a de Polignac number, because 1367865 - 2³ = 1367857 is a prime.

It is a Curzon number.

1367865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1367869) 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 23 ways as a sum of consecutive naturals, for example, 4951 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (100035).

2^1367865 is an apocalyptic number.

1367865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1367865 is a deficient number, since it is larger than the sum of its proper divisors (1032975).

1367865 is a wasteful number, since it uses less digits than its factorization.

1367865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 390 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1367865 is about 1169.5576086709. The cubic root of 1367865 is about 111.0063302940.

It can be divided in two parts, 136 and 7865, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 1367865 in words is "one million, three hundred sixty-seven thousand, eight hundred sixty-five".