1378945 has 8 divisors (see below), whose sum is σ = 1676160. Its totient is φ = 1088880.

The previous prime is 1378943. The next prime is 1378957. The reversal of 1378945 is 5498731.

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

It is not a de Polignac number, because 1378945 - 2¹ = 1378943 is a prime.

1378945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1378943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1351 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (209520).

2^1378945 is an apocalyptic number.

It is an amenable number.

1378945 is a deficient number, since it is larger than the sum of its proper divisors (297215).

1378945 is an equidigital number, since it uses as much as digits as its factorization.

1378945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its digits is 30240, while the sum is 37.

The square root of 1378945 is about 1174.2848887727. The cubic root of 1378945 is about 111.3052496685.

The spelling of 1378945 in words is "one million, three hundred seventy-eight thousand, nine hundred forty-five".