12958381 has 4 divisors (see below), whose sum is σ = 13045500. Its totient is φ = 12871264.

The previous prime is 12958357. The next prime is 12958397. The reversal of 12958381 is 18385921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18385921 = 173 ⋅106277.

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 12489156 = 685^2 + 3534^2 .

It is a cyclic number.

It is not a de Polignac number, because 12958381 - 2⁵ = 12958349 is a prime.

It is a super-2 number, since 2×12958381² = 335839276282322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12958381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12958321) 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, 43336 + ... + 43633.

It is an arithmetic number, because the mean of its divisors is an integer number (3261375).

Almost surely, 2^12958381 is an apocalyptic number.

It is an amenable number.

12958381 is a deficient number, since it is larger than the sum of its proper divisors (87119).

12958381 is an equidigital number, since it uses as much as digits as its factorization.

12958381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87118.

The product of its digits is 17280, while the sum is 37.

The square root of 12958381 is about 3599.7751318659. The cubic root of 12958381 is about 234.8822769352.

The spelling of 12958381 in words is "twelve million, nine hundred fifty-eight thousand, three hundred eighty-one".