6551409 has 16 divisors (see below), whose sum is σ = 9737280. Its totient is φ = 3893760.

The previous prime is 6551407. The next prime is 6551411. The reversal of 6551409 is 9041556.

It is an interprime number because it is at equal distance from previous prime (6551407) and next prime (6551411).

It is not a de Polignac number, because 6551409 - 2¹ = 6551407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6551407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412 + ... + 4349.

It is an arithmetic number, because the mean of its divisors is an integer number (608580).

Almost surely, 2^6551409 is an apocalyptic number.

It is an amenable number.

6551409 is a deficient number, since it is larger than the sum of its proper divisors (3185871).

6551409 is a wasteful number, since it uses less digits than its factorization.

6551409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 6551409 is about 2559.5720345401. The cubic root of 6551409 is about 187.1162783545.

The spelling of 6551409 in words is "six million, five hundred fifty-one thousand, four hundred nine".