12538205 has 4 divisors (see below), whose sum is σ = 15045852. Its totient is φ = 10030560.

The previous prime is 12538199. The next prime is 12538223. The reversal of 12538205 is 50283521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50283521 = 137 ⋅367033.

It can be written as a sum of positive squares in 2 ways, for example, as 9229444 + 3308761 = 3038^2 + 1819^2 .

It is not a de Polignac number, because 12538205 - 2¹⁰ = 12537181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253816 + ... + 1253825.

It is an arithmetic number, because the mean of its divisors is an integer number (3761463).

Almost surely, 2^12538205 is an apocalyptic number.

It is an amenable number.

12538205 is a deficient number, since it is larger than the sum of its proper divisors (2507647).

12538205 is an equidigital number, since it uses as much as digits as its factorization.

12538205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507646.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 12538205 is about 3540.9327867103. The cubic root of 12538205 is about 232.3156437364.

The spelling of 12538205 in words is "twelve million, five hundred thirty-eight thousand, two hundred five".