12489755 has 4 divisors (see below), whose sum is σ = 14987712. Its totient is φ = 9991800.

The previous prime is 12489751. The next prime is 12489773. The reversal of 12489755 is 55798421.

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

It is not a de Polignac number, because 12489755 - 2² = 12489751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12489751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248971 + ... + 1248980.

It is an arithmetic number, because the mean of its divisors is an integer number (3746928).

Almost surely, 2^12489755 is an apocalyptic number.

12489755 is a deficient number, since it is larger than the sum of its proper divisors (2497957).

12489755 is an equidigital number, since it uses as much as digits as its factorization.

12489755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497956.

The product of its digits is 100800, while the sum is 41.

The square root of 12489755 is about 3534.0847471446. The cubic root of 12489755 is about 232.0160202473.

The spelling of 12489755 in words is "twelve million, four hundred eighty-nine thousand, seven hundred fifty-five".