1385739 has 12 divisors (see below), whose sum is σ = 2028000. Its totient is φ = 911664.

The previous prime is 1385693. The next prime is 1385743. The reversal of 1385739 is 9375831.

It is not a de Polignac number, because 1385739 - 2¹¹ = 1383691 is a prime.

It is a super-2 number, since 2×1385739² = 3840545152242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1385749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264 + ... + 1685.

It is an arithmetic number, because the mean of its divisors is an integer number (169000).

2^1385739 is an apocalyptic number.

1385739 is a deficient number, since it is larger than the sum of its proper divisors (642261).

1385739 is a wasteful number, since it uses less digits than its factorization.

1385739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2031 counting only the distinct ones).

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

The square root of 1385739 is about 1177.1741587378. The cubic root of 1385739 is about 111.4877489271.

The spelling of 1385739 in words is "one million, three hundred eighty-five thousand, seven hundred thirty-nine".