1378285 has 4 divisors (see below), whose sum is σ = 1653948. Its totient is φ = 1102624.

The previous prime is 1378277. The next prime is 1378301. The reversal of 1378285 is 5828731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5828731 = 149 ⋅39119.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 885481 = 702^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378285 - 2³ = 1378277 is a prime.

It is a Duffinian number.

1378285 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137824 + ... + 137833.

It is an arithmetic number, because the mean of its divisors is an integer number (413487).

2^1378285 is an apocalyptic number.

It is an amenable number.

1378285 is a deficient number, since it is larger than the sum of its proper divisors (275663).

1378285 is an equidigital number, since it uses as much as digits as its factorization.

1378285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275662.

The product of its digits is 13440, while the sum is 34.

The square root of 1378285 is about 1174.0038330431. The cubic root of 1378285 is about 111.2874889437.

The spelling of 1378285 in words is "one million, three hundred seventy-eight thousand, two hundred eighty-five".