1379665 has 8 divisors (see below), whose sum is σ = 1892160. Its totient is φ = 946032.

The previous prime is 1379663. The next prime is 1379681. The reversal of 1379665 is 5669731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1379665 - 2¹ = 1379663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1379663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19675 + ... + 19744.

It is an arithmetic number, because the mean of its divisors is an integer number (236520).

2^1379665 is an apocalyptic number.

It is an amenable number.

1379665 is a deficient number, since it is larger than the sum of its proper divisors (512495).

1379665 is an equidigital number, since it uses as much as digits as its factorization.

1379665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39431.

The product of its digits is 34020, while the sum is 37.

The square root of 1379665 is about 1174.5914183238. The cubic root of 1379665 is about 111.3246185425.

It can be divided in two parts, 13796 and 65, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 1379665 in words is "one million, three hundred seventy-nine thousand, six hundred sixty-five".