1373665 has 8 divisors (see below), whose sum is σ = 1656360. Its totient is φ = 1093632.

The previous prime is 1373639. The next prime is 1373677. The reversal of 1373665 is 5663731.

It can be written as a sum of positive squares in 4 ways, for example, as 484416 + 889249 = 696^2 + 943^2 .

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 1373665 - 2⁹ = 1373153 is a prime.

It is a d-powerful number, because it can be written as 1 + 3 + 7⁷ + 3¹² + 6⁵ + 6⁵ + 5⁵ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (207045).

2^1373665 is an apocalyptic number.

It is an amenable number.

1373665 is a deficient number, since it is larger than the sum of its proper divisors (282695).

1373665 is a wasteful number, since it uses less digits than its factorization.

1373665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 11340, while the sum is 31.

The square root of 1373665 is about 1172.0345558046. The cubic root of 1373665 is about 111.1630048337.

The spelling of 1373665 in words is "one million, three hundred seventy-three thousand, six hundred sixty-five".