12405489 has 8 divisors (see below), whose sum is σ = 16575552. Its totient is φ = 8252880.

The previous prime is 12405469. The next prime is 12405521. The reversal of 12405489 is 98450421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12405489 - 2²⁰ = 11356913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12405469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2602 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (2071944).

Almost surely, 2^12405489 is an apocalyptic number.

It is an amenable number.

12405489 is a deficient number, since it is larger than the sum of its proper divisors (4170063).

12405489 is an equidigital number, since it uses as much as digits as its factorization.

12405489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 12405489 is about 3522.1426717270. The cubic root of 12405489 is about 231.4930530471.

The spelling of 12405489 in words is "twelve million, four hundred five thousand, four hundred eighty-nine".