1378465 has 16 divisors (see below), whose sum is σ = 1835136. Its totient is φ = 985600.

The previous prime is 1378441. The next prime is 1378499. The reversal of 1378465 is 5648731.

It is not a de Polignac number, because 1378465 - 2⁷ = 1378337 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 1378465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3729 + ... + 4081.

It is an arithmetic number, because the mean of its divisors is an integer number (114696).

2^1378465 is an apocalyptic number.

It is an amenable number.

1378465 is a deficient number, since it is larger than the sum of its proper divisors (456671).

1378465 is a wasteful number, since it uses less digits than its factorization.

1378465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 20160, while the sum is 34.

The square root of 1378465 is about 1174.0804912782. The cubic root of 1378465 is about 111.2923333399.

The spelling of 1378465 in words is "one million, three hundred seventy-eight thousand, four hundred sixty-five".