6550945 has 4 divisors (see below), whose sum is σ = 7861140. Its totient is φ = 5240752.

The previous prime is 6550927. The next prime is 6550963. The reversal of 6550945 is 5490556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6550927) and next prime (6550963).

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 2614689 = 1984^2 + 1617^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550945 - 2⁵ = 6550913 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6550945.

It is an unprimeable number.

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, 655090 + ... + 655099.

It is an arithmetic number, because the mean of its divisors is an integer number (1965285).

Almost surely, 2^6550945 is an apocalyptic number.

It is an amenable number.

6550945 is a deficient number, since it is larger than the sum of its proper divisors (1310195).

6550945 is a wasteful number, since it uses less digits than its factorization.

6550945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310194.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 6550945 is about 2559.4813927825. The cubic root of 6550945 is about 187.1118607805. Note that the first 3 decimals are identical.

The spelling of 6550945 in words is "six million, five hundred fifty thousand, nine hundred forty-five".