15138575 has 6 divisors (see below), whose sum is σ = 18771864. Its totient is φ = 12110840.

The previous prime is 15138523. The next prime is 15138581. The reversal of 15138575 is 57583151.

It is not a de Polignac number, because 15138575 - 2¹⁸ = 14876431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302747 + ... + 302796.

It is an arithmetic number, because the mean of its divisors is an integer number (3128644).

Almost surely, 2^15138575 is an apocalyptic number.

15138575 is a deficient number, since it is larger than the sum of its proper divisors (3633289).

15138575 is an equidigital number, since it uses as much as digits as its factorization.

15138575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605553 (or 605548 counting only the distinct ones).

The product of its digits is 21000, while the sum is 35.

The square root of 15138575 is about 3890.8321731989. The cubic root of 15138575 is about 247.3783369664.

The spelling of 15138575 in words is "fifteen million, one hundred thirty-eight thousand, five hundred seventy-five".