6246781 has 2 divisors, whose sum is σ = 6246782. Its totient is φ = 6246780.

The previous prime is 6246761. The next prime is 6246787. The reversal of 6246781 is 1876426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4644025 + 1602756 = 2155^2 + 1266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6246781 is a prime.

It is a super-2 number, since 2×6246781² = 78044545723922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6246787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3123390 + 3123391.

It is an arithmetic number, because the mean of its divisors is an integer number (3123391).

Almost surely, 2^6246781 is an apocalyptic number.

It is an amenable number.

6246781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6246781 is an equidigital number, since it uses as much as digits as its factorization.

6246781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 6246781 is about 2499.3561170830. The cubic root of 6246781 is about 184.1699457749.

It can be divided in two parts, 6246 and 781, that multiplied together give a triangular number (4878126 = T₃₁₂₃).

The spelling of 6246781 in words is "six million, two hundred forty-six thousand, seven hundred eighty-one".