12653981 has 8 divisors (see below), whose sum is σ = 13353600. Its totient is φ = 11957760.

The previous prime is 12653957. The next prime is 12653999. The reversal of 12653981 is 18935621.

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 12653981 - 2⁶ = 12653917 is a prime.

It is a super-2 number, since 2×12653981² = 320246470296722, which contains 22 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 (12653281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11660 + ... + 12698.

It is an arithmetic number, because the mean of its divisors is an integer number (1669200).

Almost surely, 2^12653981 is an apocalyptic number.

It is an amenable number.

12653981 is a deficient number, since it is larger than the sum of its proper divisors (699619).

12653981 is a wasteful number, since it uses less digits than its factorization.

12653981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699.

The product of its digits is 12960, while the sum is 35.

The square root of 12653981 is about 3557.2434552614. The cubic root of 12653981 is about 233.0285105748.

The spelling of 12653981 in words is "twelve million, six hundred fifty-three thousand, nine hundred eighty-one".