6501945 has 16 divisors (see below), whose sum is σ = 10762560. Its totient is φ = 3347904.

The previous prime is 6501889. The next prime is 6501947. The reversal of 6501945 is 5491056.

6501945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6501945 - 2⁸ = 6501689 is a prime.

6501945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6501947) 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, 7039 + ... + 7908.

It is an arithmetic number, because the mean of its divisors is an integer number (672660).

Almost surely, 2^6501945 is an apocalyptic number.

It is an amenable number.

6501945 is a deficient number, since it is larger than the sum of its proper divisors (4260615).

6501945 is a wasteful number, since it uses less digits than its factorization.

6501945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14984.

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

The square root of 6501945 is about 2549.8911741484. The cubic root of 6501945 is about 186.6441706876.

The spelling of 6501945 in words is "six million, five hundred one thousand, nine hundred forty-five".