12535139 has 4 divisors (see below), whose sum is σ = 12600960. Its totient is φ = 12469320.

The previous prime is 12535123. The next prime is 12535141. The reversal of 12535139 is 93153521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93153521 = 2003 ⋅46507.

It is a cyclic number.

It is not a de Polignac number, because 12535139 - 2⁴ = 12535123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12538139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32624 + ... + 33005.

It is an arithmetic number, because the mean of its divisors is an integer number (3150240).

Almost surely, 2^12535139 is an apocalyptic number.

12535139 is a deficient number, since it is larger than the sum of its proper divisors (65821).

12535139 is an equidigital number, since it uses as much as digits as its factorization.

12535139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65820.

The product of its digits is 4050, while the sum is 29.

The square root of 12535139 is about 3540.4998234713. The cubic root of 12535139 is about 232.2967059424.

The spelling of 12535139 in words is "twelve million, five hundred thirty-five thousand, one hundred thirty-nine".