6408761 has 4 divisors (see below), whose sum is σ = 6414372. Its totient is φ = 6403152.

The previous prime is 6408749. The next prime is 6408769. The reversal of 6408761 is 1678046.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3367225 + 3041536 = 1835^2 + 1744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6408761 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6408769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (1603593).

Almost surely, 2^6408761 is an apocalyptic number.

It is an amenable number.

6408761 is a deficient number, since it is larger than the sum of its proper divisors (5611).

6408761 is a wasteful number, since it uses less digits than its factorization.

6408761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610.

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

The square root of 6408761 is about 2531.5530806207. The cubic root of 6408761 is about 185.7482333828.

The spelling of 6408761 in words is "six million, four hundred eight thousand, seven hundred sixty-one".