15135138 has 12 divisors (see below), whose sum is σ = 32792838. Its totient is φ = 5045040.

The previous prime is 15135121. The next prime is 15135143. The reversal of 15135138 is 83153151.

It can be written as a sum of positive squares in only one way, i.e., 10712529 + 4422609 = 3273^2 + 2103^2 .

It is an unprimeable number.

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, 420403 + ... + 420438.

Almost surely, 2^15135138 is an apocalyptic number.

15135138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15135138 is an abundant number, since it is smaller than the sum of its proper divisors (17657700).

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

15135138 is a wasteful number, since it uses less digits than its factorization.

15135138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840849 (or 840846 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 15135138 is about 3890.3904688347. The cubic root of 15135138 is about 247.3596142950.

Adding to 15135138 its reverse (83153151), we get a palindrome (98288289).

The spelling of 15135138 in words is "fifteen million, one hundred thirty-five thousand, one hundred thirty-eight".