1388137 has 4 divisors (see below), whose sum is σ = 1422036. Its totient is φ = 1354240.

The previous prime is 1388117. The next prime is 1388141. The reversal of 1388137 is 7318831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7318831 = 13 ⋅562987.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 549081 = 916^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388137 - 2¹¹ = 1386089 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388099 and 1388108.

It is not an unprimeable number, because it can be changed into a prime (1388117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16888 + ... + 16969.

It is an arithmetic number, because the mean of its divisors is an integer number (355509).

2^1388137 is an apocalyptic number.

It is an amenable number.

1388137 is a deficient number, since it is larger than the sum of its proper divisors (33899).

1388137 is an equidigital number, since it uses as much as digits as its factorization.

1388137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33898.

The product of its digits is 4032, while the sum is 31.

The square root of 1388137 is about 1178.1922593533. The cubic root of 1388137 is about 111.5520211449.

The spelling of 1388137 in words is "one million, three hundred eighty-eight thousand, one hundred thirty-seven".