245001221 has 8 divisors (see below), whose sum is σ = 255830400. Its totient is φ = 234186832.

The previous prime is 245001209. The next prime is 245001223. The reversal of 245001221 is 122100542.

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 245001221 - 2⁶ = 245001157 is a prime.

It is a Duffinian number.

245001221 is a modest number, since divided by 1221 gives 245 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 245001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245001223) 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 7 ways as a sum of consecutive naturals, for example, 42680 + ... + 48078.

It is an arithmetic number, because the mean of its divisors is an integer number (31978800).

Almost surely, 2^245001221 is an apocalyptic number.

It is an amenable number.

245001221 is a deficient number, since it is larger than the sum of its proper divisors (10829179).

245001221 is a wasteful number, since it uses less digits than its factorization.

245001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7395.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 245001221 is about 15652.5148458642. The cubic root of 245001221 is about 625.7335140480.

Adding to 245001221 its reverse (122100542), we get a palindrome (367101763).

The spelling of 245001221 in words is "two hundred forty-five million, one thousand, two hundred twenty-one".