1373865 has 8 divisors (see below), whose sum is σ = 2198208. Its totient is φ = 732720.

The previous prime is 1373861. The next prime is 1373873. The reversal of 1373865 is 5683731.

It is a happy number.

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

It is not a de Polignac number, because 1373865 - 2² = 1373861 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1373861) 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, 45781 + ... + 45810.

It is an arithmetic number, because the mean of its divisors is an integer number (274776).

2^1373865 is an apocalyptic number.

1373865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1373865 is a deficient number, since it is larger than the sum of its proper divisors (824343).

1373865 is an equidigital number, since it uses as much as digits as its factorization.

1373865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91599.

The product of its digits is 15120, while the sum is 33.

The square root of 1373865 is about 1172.1198744156. The cubic root of 1373865 is about 111.1683995313.

The spelling of 1373865 in words is "one million, three hundred seventy-three thousand, eight hundred sixty-five".