12455689 has 4 divisors (see below), whose sum is σ = 12690756. Its totient is φ = 12220624.

The previous prime is 12455671. The next prime is 12455701. The reversal of 12455689 is 98655421.

12455689 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 an emirpimes, since its reverse is a distinct semiprime: 98655421 = 853 ⋅115657.

It can be written as a sum of positive squares in 2 ways, for example, as 6734025 + 5721664 = 2595^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 12455689 - 2⁵ = 12455657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12455189) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117454 + ... + 117559.

It is an arithmetic number, because the mean of its divisors is an integer number (3172689).

Almost surely, 2^12455689 is an apocalyptic number.

It is an amenable number.

12455689 is a deficient number, since it is larger than the sum of its proper divisors (235067).

12455689 is an equidigital number, since it uses as much as digits as its factorization.

12455689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235066.

The product of its digits is 86400, while the sum is 40.

The square root of 12455689 is about 3529.2618208345. The cubic root of 12455689 is about 231.8048857449.

Subtracting from 12455689 its product of digits (86400), we obtain a square (12369289 = 3517²).

The spelling of 12455689 in words is "twelve million, four hundred fifty-five thousand, six hundred eighty-nine".