6406975 has 6 divisors (see below), whose sum is σ = 7944680. Its totient is φ = 5125560.

The previous prime is 6406973. The next prime is 6406997. The reversal of 6406975 is 5796046.

It is not a de Polignac number, because 6406975 - 2¹ = 6406973 is a prime.

It is a d-powerful number, because it can be written as 6⁷ + 4⁶ + 0 + 6⁷ + 9² + 7⁸ + 5⁷ .

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406973) 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 5 ways as a sum of consecutive naturals, for example, 128115 + ... + 128164.

Almost surely, 2^6406975 is an apocalyptic number.

6406975 is a deficient number, since it is larger than the sum of its proper divisors (1537705).

6406975 is a wasteful number, since it uses less digits than its factorization.

6406975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256289 (or 256284 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6406975 is about 2531.2003081542. The cubic root of 6406975 is about 185.7309769444.

It can be divided in two parts, 6406 and 975, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6406975 in words is "six million, four hundred six thousand, nine hundred seventy-five".