13126981 has 8 divisors (see below), whose sum is σ = 15486464. Its totient is φ = 10888560.

The previous prime is 13126963. The next prime is 13126991. The reversal of 13126981 is 18962131.

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 13126981 - 2⁹ = 13126469 is a prime.

It is a super-2 number, since 2×13126981² = 344635260348722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13126901) 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, 30030 + ... + 30463.

It is an arithmetic number, because the mean of its divisors is an integer number (1935808).

Almost surely, 2^13126981 is an apocalyptic number.

It is an amenable number.

13126981 is a deficient number, since it is larger than the sum of its proper divisors (2359483).

13126981 is an equidigital number, since it uses as much as digits as its factorization.

13126981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60531.

The product of its digits is 2592, while the sum is 31.

The square root of 13126981 is about 3623.1175802063. The cubic root of 13126981 is about 235.8965660401.

The spelling of 13126981 in words is "thirteen million, one hundred twenty-six thousand, nine hundred eighty-one".