12459991 has 8 divisors (see below), whose sum is σ = 13202480. Its totient is φ = 11726208.

The previous prime is 12459973. The next prime is 12460001. The reversal of 12459991 is 19995421.

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

It is a cyclic number.

It is not a de Polignac number, because 12459991 - 2⁹ = 12459479 is a prime.

It is a super-3 number, since 3×12459991³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12459961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (1650310).

Almost surely, 2^12459991 is an apocalyptic number.

12459991 is a deficient number, since it is larger than the sum of its proper divisors (742489).

12459991 is a wasteful number, since it uses less digits than its factorization.

12459991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353.

The product of its digits is 29160, while the sum is 40.

The square root of 12459991 is about 3529.8712441108. The cubic root of 12459991 is about 231.8315699327.

It can be divided in two parts, 1245 and 9991, that added together give a square (11236 = 106²).

The spelling of 12459991 in words is "twelve million, four hundred fifty-nine thousand, nine hundred ninety-one".