1500138 has 12 divisors (see below), whose sum is σ = 3250338. Its totient is φ = 500040.

The previous prime is 1500133. The next prime is 1500139. The reversal of 1500138 is 8310051.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 986049 + 514089 = 993^2 + 717^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 83341 = 1500138 / (1 + 5 + 0 + 0 + 1 + 3 + 8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1500138.

It is not an unprimeable number, because it can be changed into a prime (1500133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41653 + ... + 41688.

2^1500138 is an apocalyptic number.

1500138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1500138 is an abundant number, since it is smaller than the sum of its proper divisors (1750200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1500138 is a wasteful number, since it uses less digits than its factorization.

1500138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83349 (or 83346 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1500138 is about 1224.8012083600. The cubic root of 1500138 is about 114.4749346047.

Adding to 1500138 its reverse (8310051), we get a palindrome (9810189).

The spelling of 1500138 in words is "one million, five hundred thousand, one hundred thirty-eight".