1367665 has 16 divisors (see below), whose sum is σ = 1805328. Its totient is φ = 988416.

The previous prime is 1367647. The next prime is 1367687. The reversal of 1367665 is 5667631.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5776 + 1361889 = 76^2 + 1167^2 .

It is not a de Polignac number, because 1367665 - 2⁹ = 1367153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1367665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3247 + ... + 3643.

It is an arithmetic number, because the mean of its divisors is an integer number (112833).

2^1367665 is an apocalyptic number.

It is an amenable number.

1367665 is a deficient number, since it is larger than the sum of its proper divisors (437663).

1367665 is a wasteful number, since it uses less digits than its factorization.

1367665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468.

The product of its digits is 22680, while the sum is 34.

The square root of 1367665 is about 1169.4721031303. The cubic root of 1367665 is about 111.0009198311. Note that the first 3 decimals are identical.

Subtracting from 1367665 its sum of digits (34), we obtain a palindrome (1367631).

The spelling of 1367665 in words is "one million, three hundred sixty-seven thousand, six hundred sixty-five".