12385551 has 4 divisors (see below), whose sum is σ = 16514072. Its totient is φ = 8257032.

The previous prime is 12385531. The next prime is 12385559. The reversal of 12385551 is 15558321.

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

It is not a de Polignac number, because 12385551 - 2⁵ = 12385519 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 (12385559) 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, 2064256 + ... + 2064261.

It is an arithmetic number, because the mean of its divisors is an integer number (4128518).

Almost surely, 2^12385551 is an apocalyptic number.

12385551 is a deficient number, since it is larger than the sum of its proper divisors (4128521).

12385551 is an equidigital number, since it uses as much as digits as its factorization.

12385551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128520.

The product of its digits is 6000, while the sum is 30.

The square root of 12385551 is about 3519.3111541891. The cubic root of 12385551 is about 231.3689686365.

The spelling of 12385551 in words is "twelve million, three hundred eighty-five thousand, five hundred fifty-one".