15745139 has 2 divisors, whose sum is σ = 15745140. Its totient is φ = 15745138.

The previous prime is 15745127. The next prime is 15745207. The reversal of 15745139 is 93154751.

It is a weak prime.

It is an emirp because it is prime and its reverse (93154751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15745139 - 2⁴ = 15745123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15745099 and 15745108.

It is not a weakly prime, because it can be changed into another prime (15745039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7872569 + 7872570.

It is an arithmetic number, because the mean of its divisors is an integer number (7872570).

Almost surely, 2^15745139 is an apocalyptic number.

15745139 is a deficient number, since it is larger than the sum of its proper divisors (1).

15745139 is an equidigital number, since it uses as much as digits as its factorization.

15745139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 35.

The square root of 15745139 is about 3968.0144909010. The cubic root of 15745139 is about 250.6391061146.

The spelling of 15745139 in words is "fifteen million, seven hundred forty-five thousand, one hundred thirty-nine".