12491870 has 8 divisors (see below), whose sum is σ = 22485384. Its totient is φ = 4996744.

The previous prime is 12491867. The next prime is 12491879. The reversal of 12491870 is 7819421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491879) 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, 624584 + ... + 624603.

It is an arithmetic number, because the mean of its divisors is an integer number (2810673).

Almost surely, 2^12491870 is an apocalyptic number.

12491870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12491870 is a deficient number, since it is larger than the sum of its proper divisors (9993514).

12491870 is a wasteful number, since it uses less digits than its factorization.

12491870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249194.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12491870 is about 3534.3839632954. The cubic root of 12491870 is about 232.0291159455.

The spelling of 12491870 in words is "twelve million, four hundred ninety-one thousand, eight hundred seventy".