12148559 has 4 divisors (see below), whose sum is σ = 12540480. Its totient is φ = 11756640.

The previous prime is 12148537. The next prime is 12148561. The reversal of 12148559 is 95584121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12148559 - 2¹² = 12144463 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 (12141559) 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, 195914 + ... + 195975.

It is an arithmetic number, because the mean of its divisors is an integer number (3135120).

Almost surely, 2^12148559 is an apocalyptic number.

12148559 is a deficient number, since it is larger than the sum of its proper divisors (391921).

12148559 is an equidigital number, since it uses as much as digits as its factorization.

12148559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391920.

The product of its digits is 14400, while the sum is 35.

The square root of 12148559 is about 3485.4783029019. The cubic root of 12148559 is about 229.8837408658.

The spelling of 12148559 in words is "twelve million, one hundred forty-eight thousand, five hundred fifty-nine".