12506489 has 4 divisors (see below), whose sum is σ = 12572160. Its totient is φ = 12440820.

The previous prime is 12506479. The next prime is 12506491. The reversal of 12506489 is 98460521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98460521 = 223 ⋅441527.

It is a cyclic number.

It is not a de Polignac number, because 12506489 - 2⁸ = 12506233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12506449) 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, 32549 + ... + 32930.

It is an arithmetic number, because the mean of its divisors is an integer number (3143040).

Almost surely, 2^12506489 is an apocalyptic number.

It is an amenable number.

12506489 is a deficient number, since it is larger than the sum of its proper divisors (65671).

12506489 is an equidigital number, since it uses as much as digits as its factorization.

12506489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65670.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12506489 is about 3536.4514700473. The cubic root of 12506489 is about 232.1195937601.

The spelling of 12506489 in words is "twelve million, five hundred six thousand, four hundred eighty-nine".