1378365 has 16 divisors (see below), whose sum is σ = 2257728. Its totient is φ = 717696.

The previous prime is 1378339. The next prime is 1378373. The reversal of 1378365 is 5638731.

It is a happy number.

It is not a de Polignac number, because 1378365 - 2⁶ = 1378301 is a prime.

It is a Curzon number.

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, 424 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (141108).

2^1378365 is an apocalyptic number.

1378365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378365 is a deficient number, since it is larger than the sum of its proper divisors (879363).

1378365 is a wasteful number, since it uses less digits than its factorization.

1378365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

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

The square root of 1378365 is about 1174.0379039878. The cubic root of 1378365 is about 111.2896420607.

The spelling of 1378365 in words is "one million, three hundred seventy-eight thousand, three hundred sixty-five".