6138981 has 24 divisors (see below), whose sum is σ = 9403680. Its totient is φ = 3852576.

The previous prime is 6138947. The next prime is 6138983. The reversal of 6138981 is 1898316.

It is not a de Polignac number, because 6138981 - 2⁹ = 6138469 is a prime.

It is a super-2 number, since 2×6138981² = 75374175436722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10950 + ... + 11496.

It is an arithmetic number, because the mean of its divisors is an integer number (391820).

Almost surely, 2^6138981 is an apocalyptic number.

It is an amenable number.

6138981 is a deficient number, since it is larger than the sum of its proper divisors (3264699).

6138981 is a wasteful number, since it uses less digits than its factorization.

6138981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 622 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 6138981 is about 2477.6967126749. The cubic root of 6138981 is about 183.1043926459.

The spelling of 6138981 in words is "six million, one hundred thirty-eight thousand, nine hundred eighty-one".