645239301 has 48 divisors (see below), whose sum is σ = 1093962240. Its totient is φ = 335784960.

The previous prime is 645239293. The next prime is 645239317. The reversal of 645239301 is 103932546.

It is not a de Polignac number, because 645239301 - 2³ = 645239293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645239341) 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 47 ways as a sum of consecutive naturals, for example, 73305 + ... + 81633.

It is an arithmetic number, because the mean of its divisors is an integer number (22790880).

Almost surely, 2^645239301 is an apocalyptic number.

It is an amenable number.

645239301 is a deficient number, since it is larger than the sum of its proper divisors (448722939).

645239301 is a wasteful number, since it uses less digits than its factorization.

645239301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394 (or 8387 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 645239301 is about 25401.5609953404. The cubic root of 645239301 is about 864.1190987547.

It can be divided in two parts, 6452 and 39301, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 645239301 in words is "six hundred forty-five million, two hundred thirty-nine thousand, three hundred one".