13142981 has 2 divisors, whose sum is σ = 13142982. Its totient is φ = 13142980.

The previous prime is 13142971. The next prime is 13143037. The reversal of 13142981 is 18924131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 3094081 = 3170^2 + 1759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13142981 is a prime.

It is a super-2 number, since 2×13142981² = 345475899132722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13142911) 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 as a sum of consecutive naturals, namely, 6571490 + 6571491.

It is an arithmetic number, because the mean of its divisors is an integer number (6571491).

Almost surely, 2^13142981 is an apocalyptic number.

It is an amenable number.

13142981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13142981 is an equidigital number, since it uses as much as digits as its factorization.

13142981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 13142981 is about 3625.3249509527. The cubic root of 13142981 is about 235.9923690437.

The spelling of 13142981 in words is "thirteen million, one hundred forty-two thousand, nine hundred eighty-one".