15138671 has 4 divisors (see below), whose sum is σ = 15181200. Its totient is φ = 15096144.

The previous prime is 15138647. The next prime is 15138677. The reversal of 15138671 is 17683151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15138671 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 (15138677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20726 + ... + 21443.

It is an arithmetic number, because the mean of its divisors is an integer number (3795300).

Almost surely, 2^15138671 is an apocalyptic number.

15138671 is a deficient number, since it is larger than the sum of its proper divisors (42529).

15138671 is an equidigital number, since it uses as much as digits as its factorization.

15138671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42528.

The product of its digits is 5040, while the sum is 32.

The square root of 15138671 is about 3890.8445098719. The cubic root of 15138671 is about 247.3788598749.

The spelling of 15138671 in words is "fifteen million, one hundred thirty-eight thousand, six hundred seventy-one".