12451881 has 8 divisors (see below), whose sum is σ = 17879680. Its totient is φ = 7662672.

The previous prime is 12451877. The next prime is 12451903. The reversal of 12451881 is 18815421.

It is a happy number.

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

It is not a de Polignac number, because 12451881 - 2² = 12451877 is a prime.

It is a super-2 number, since 2×12451881² = 310098680876322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12451841) 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, 159601 + ... + 159678.

It is an arithmetic number, because the mean of its divisors is an integer number (2234960).

Almost surely, 2^12451881 is an apocalyptic number.

It is an amenable number.

12451881 is a deficient number, since it is larger than the sum of its proper divisors (5427799).

12451881 is a wasteful number, since it uses less digits than its factorization.

12451881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319295.

The product of its digits is 2560, while the sum is 30.

The square root of 12451881 is about 3528.7222900081. The cubic root of 12451881 is about 231.7812605839.

The spelling of 12451881 in words is "twelve million, four hundred fifty-one thousand, eight hundred eighty-one".