1385139 has 16 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 779520.

The previous prime is 1385117. The next prime is 1385147. The reversal of 1385139 is 9315831.

It is a happy number.

It is not a de Polignac number, because 1385139 - 2¹² = 1381043 is a prime.

It is a super-2 number, since 2×1385139² = 3837220098642, which contains 22 as substring.

1385139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1385149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027 + ... + 1955.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^1385139 is an apocalyptic number.

1385139 is a deficient number, since it is larger than the sum of its proper divisors (757581).

1385139 is an equidigital number, since it uses as much as digits as its factorization.

1385139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010.

The product of its digits is 3240, while the sum is 30.

The square root of 1385139 is about 1176.9192835535. The cubic root of 1385139 is about 111.4716558759.

The spelling of 1385139 in words is "one million, three hundred eighty-five thousand, one hundred thirty-nine".