6257981 has 2 divisors, whose sum is σ = 6257982. Its totient is φ = 6257980.

The previous prime is 6257969. The next prime is 6258013. The reversal of 6257981 is 1897526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6205081 + 52900 = 2491^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 6257981 - 2⁶ = 6257917 is a prime.

It is a super-2 number, since 2×6257981² = 78324652392722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6257941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128990 + 3128991.

It is an arithmetic number, because the mean of its divisors is an integer number (3128991).

Almost surely, 2^6257981 is an apocalyptic number.

It is an amenable number.

6257981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6257981 is an equidigital number, since it uses as much as digits as its factorization.

6257981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 6257981 is about 2501.5956907542. The cubic root of 6257981 is about 184.2799475963.

The spelling of 6257981 in words is "six million, two hundred fifty-seven thousand, nine hundred eighty-one".