12745553 has 4 divisors (see below), whose sum is σ = 12774768. Its totient is φ = 12716340.

The previous prime is 12745549. The next prime is 12745567. The reversal of 12745553 is 35554721.

12745553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 12745553 - 2² = 12745549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12745573) 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, 13943 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (3193692).

Almost surely, 2^12745553 is an apocalyptic number.

It is an amenable number.

12745553 is a deficient number, since it is larger than the sum of its proper divisors (29215).

12745553 is an equidigital number, since it uses as much as digits as its factorization.

12745553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29214.

The product of its digits is 21000, while the sum is 32.

The square root of 12745553 is about 3570.0914554112. The cubic root of 12745553 is about 233.5892726766.

The spelling of 12745553 in words is "twelve million, seven hundred forty-five thousand, five hundred fifty-three".