321248645 has 8 divisors (see below), whose sum is σ = 385940256. Its totient is φ = 256704336.

The previous prime is 321248633. The next prime is 321248647. The reversal of 321248645 is 546842123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321248645 - 2⁶ = 321248581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321248647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31967 + ... + 40796.

It is an arithmetic number, because the mean of its divisors is an integer number (48242532).

Almost surely, 2^321248645 is an apocalyptic number.

It is an amenable number.

321248645 is a deficient number, since it is larger than the sum of its proper divisors (64691611).

321248645 is an equidigital number, since it uses as much as digits as its factorization.

321248645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73651.

The product of its digits is 46080, while the sum is 35.

The square root of 321248645 is about 17923.4105292492. The cubic root of 321248645 is about 684.8788710820.

The spelling of 321248645 in words is "three hundred twenty-one million, two hundred forty-eight thousand, six hundred forty-five".