1378745 has 8 divisors (see below), whose sum is σ = 1689984. Its totient is φ = 1079344.

The previous prime is 1378733. The next prime is 1378759. The reversal of 1378745 is 5478731.

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 1378745 - 2⁶ = 1378681 is a prime.

It is a Duffinian number.

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, 2699 + ... + 3168.

It is an arithmetic number, because the mean of its divisors is an integer number (211248).

2^1378745 is an apocalyptic number.

It is an amenable number.

1378745 is a deficient number, since it is larger than the sum of its proper divisors (311239).

1378745 is an equidigital number, since it uses as much as digits as its factorization.

1378745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919.

The product of its digits is 23520, while the sum is 35.

The square root of 1378745 is about 1174.1997274740. The cubic root of 1378745 is about 111.2998682292.

The spelling of 1378745 in words is "one million, three hundred seventy-eight thousand, seven hundred forty-five".