245604221 has 8 divisors (see below), whose sum is σ = 250985280. Its totient is φ = 240280992.

The previous prime is 245604217. The next prime is 245604223. The reversal of 245604221 is 122406542.

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 245604221 - 2² = 245604217 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 (245604223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5816 + ... + 22913.

It is an arithmetic number, because the mean of its divisors is an integer number (31373160).

Almost surely, 2^245604221 is an apocalyptic number.

It is an amenable number.

245604221 is a deficient number, since it is larger than the sum of its proper divisors (5381059).

245604221 is a wasteful number, since it uses less digits than its factorization.

245604221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28915.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 245604221 is about 15671.7650888469. The cubic root of 245604221 is about 626.2464477895.

The spelling of 245604221 in words is "two hundred forty-five million, six hundred four thousand, two hundred twenty-one".