1388159 has 4 divisors (see below), whose sum is σ = 1461240. Its totient is φ = 1315080.

The previous prime is 1388141. The next prime is 1388161. The reversal of 1388159 is 9518831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9518831 = 7 ⋅1359833.

It is a cyclic number.

It is not a de Polignac number, because 1388159 - 2²⁰ = 339583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36512 + ... + 36549.

It is an arithmetic number, because the mean of its divisors is an integer number (365310).

2^1388159 is an apocalyptic number.

1388159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1388159 is a deficient number, since it is larger than the sum of its proper divisors (73081).

1388159 is an equidigital number, since it uses as much as digits as its factorization.

1388159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73080.

The product of its digits is 8640, while the sum is 35.

The square root of 1388159 is about 1178.2015956533. The cubic root of 1388159 is about 111.5526104555.

The spelling of 1388159 in words is "one million, three hundred eighty-eight thousand, one hundred fifty-nine".