1378539 has 28 divisors (see below), whose sum is σ = 2168512. Its totient is φ = 874800.

The previous prime is 1378529. The next prime is 1378541. The reversal of 1378539 is 9358731.

It is not a de Polignac number, because 1378539 - 2¹¹ = 1376491 is a prime.

1378539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1378519) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 22569 + ... + 22629.

2^1378539 is an apocalyptic number.

1378539 is a deficient number, since it is larger than the sum of its proper divisors (789973).

1378539 is an frugal number, since it uses more digits than its factorization.

1378539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 95 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1378539 is about 1174.1120048786. The cubic root of 1378539 is about 111.2943248027.

It can be divided in two parts, 13785 and 39, that added together give a cube (13824 = 24³).

The spelling of 1378539 in words is "one million, three hundred seventy-eight thousand, five hundred thirty-nine".