12348509 has 4 divisors (see below), whose sum is σ = 12746880. Its totient is φ = 11950140.

The previous prime is 12348487. The next prime is 12348517. The reversal of 12348509 is 90584321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90584321 = 883 ⋅102587.

It is a cyclic number.

It is not a de Polignac number, because 12348509 - 2¹² = 12344413 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 (12348529) 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, 199139 + ... + 199200.

It is an arithmetic number, because the mean of its divisors is an integer number (3186720).

Almost surely, 2^12348509 is an apocalyptic number.

It is an amenable number.

12348509 is a deficient number, since it is larger than the sum of its proper divisors (398371).

12348509 is an equidigital number, since it uses as much as digits as its factorization.

12348509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398370.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 12348509 is about 3514.0445358589. The cubic root of 12348509 is about 231.1380832690.

The spelling of 12348509 in words is "twelve million, three hundred forty-eight thousand, five hundred nine".