645234325 has 24 divisors (see below), whose sum is σ = 819322560. Its totient is φ = 503904000.

The previous prime is 645234299. The next prime is 645234347. The reversal of 645234325 is 523432546.

It is not a de Polignac number, because 645234325 - 2⁷ = 645234197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221277 + ... + 224173.

It is an arithmetic number, because the mean of its divisors is an integer number (34138440).

Almost surely, 2^645234325 is an apocalyptic number.

It is an amenable number.

645234325 is a deficient number, since it is larger than the sum of its proper divisors (174088235).

645234325 is a wasteful number, since it uses less digits than its factorization.

645234325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3112 counting only the distinct ones).

The product of its digits is 86400, while the sum is 34.

The square root of 645234325 is about 25401.4630484151. The cubic root of 645234325 is about 864.1168774250.

The spelling of 645234325 in words is "six hundred forty-five million, two hundred thirty-four thousand, three hundred twenty-five".