6460781 has 2 divisors, whose sum is σ = 6460782. Its totient is φ = 6460780.

The previous prime is 6460759. The next prime is 6460801. The reversal of 6460781 is 1870646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4583881 + 1876900 = 2141^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 6460781 - 2⁶ = 6460717 is a prime.

It is a super-2 number, since 2×6460781² = 83483382259922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6460711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230390 + 3230391.

It is an arithmetic number, because the mean of its divisors is an integer number (3230391).

Almost surely, 2^6460781 is an apocalyptic number.

It is an amenable number.

6460781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6460781 is an equidigital number, since it uses as much as digits as its factorization.

6460781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 6460781 is about 2541.8066409544. The cubic root of 6460781 is about 186.2494533263.

The spelling of 6460781 in words is "six million, four hundred sixty thousand, seven hundred eighty-one".