245256321 has 8 divisors (see below), whose sum is σ = 330683040. Its totient is φ = 161666912.

The previous prime is 245256317. The next prime is 245256329. The reversal of 245256321 is 123652542.

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 245256321 - 2² = 245256317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245256329) 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, 459015 + ... + 459548.

It is an arithmetic number, because the mean of its divisors is an integer number (41335380).

Almost surely, 2^245256321 is an apocalyptic number.

It is an amenable number.

245256321 is a deficient number, since it is larger than the sum of its proper divisors (85426719).

245256321 is an equidigital number, since it uses as much as digits as its factorization.

245256321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918655.

The product of its digits is 14400, while the sum is 30.

The square root of 245256321 is about 15660.6615760638. The cubic root of 245256321 is about 625.9506139865.

The spelling of 245256321 in words is "two hundred forty-five million, two hundred fifty-six thousand, three hundred twenty-one".