6400761 has 4 divisors (see below), whose sum is σ = 8534352. Its totient is φ = 4267172.

The previous prime is 6400759. The next prime is 6400763. The reversal of 6400761 is 1670046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6400759) and next prime (6400763).

It is a cyclic number.

It is not a de Polignac number, because 6400761 - 2¹ = 6400759 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6400763) 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 3 ways as a sum of consecutive naturals, for example, 1066791 + ... + 1066796.

It is an arithmetic number, because the mean of its divisors is an integer number (2133588).

Almost surely, 2^6400761 is an apocalyptic number.

It is an amenable number.

6400761 is a deficient number, since it is larger than the sum of its proper divisors (2133591).

6400761 is a wasteful number, since it uses less digits than its factorization.

6400761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133590.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 6400761 is about 2529.9725294951. The cubic root of 6400761 is about 185.6709119052.

The spelling of 6400761 in words is "six million, four hundred thousand, seven hundred sixty-one".