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6494945 = 51298989
BaseRepresentation
bin11000110001101011100001
3110012222101112
4120301223201
53130314240
6351113105
7106130462
oct30615341
913188345
106494945
113736826
122212795
131465382
14c10d69
15884665
hex631ae1

6494945 has 4 divisors (see below), whose sum is σ = 7793940. Its totient is φ = 5195952.

The previous prime is 6494921. The next prime is 6494951. The reversal of 6494945 is 5494946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5494946 = 22747473.

It can be written as a sum of positive squares in 2 ways, for example, as 3411409 + 3083536 = 1847^2 + 1756^2 .

It is a cyclic number.

It is not a de Polignac number, because 6494945 - 26 = 6494881 is a prime.

It is an unprimeable number.

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, 649490 + ... + 649499.

It is an arithmetic number, because the mean of its divisors is an integer number (1948485).

Almost surely, 26494945 is an apocalyptic number.

It is an amenable number.

6494945 is a deficient number, since it is larger than the sum of its proper divisors (1298995).

6494945 is a wasteful number, since it uses less digits than its factorization.

6494945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298994.

The product of its digits is 155520, while the sum is 41.

The square root of 6494945 is about 2548.5181969136. The cubic root of 6494945 is about 186.5771662072.

Subtracting from 6494945 its reverse (5494946), we obtain a palindrome (999999).

The spelling of 6494945 in words is "six million, four hundred ninety-four thousand, nine hundred forty-five".

Divisors: 1 5 1298989 6494945