245201521 has 8 divisors (see below), whose sum is σ = 248598720. Its totient is φ = 241825008.

The previous prime is 245201519. The next prime is 245201527. The reversal of 245201521 is 125102542.

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 245201521 - 2¹ = 245201519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245201492 and 245201501.

It is not an unprimeable number, because it can be changed into a prime (245201527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19500 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (31074840).

Almost surely, 2^245201521 is an apocalyptic number.

It is an amenable number.

245201521 is a deficient number, since it is larger than the sum of its proper divisors (3397199).

245201521 is a wasteful number, since it uses less digits than its factorization.

245201521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 245201521 is about 15658.9118715190. The cubic root of 245201521 is about 625.9039897736.

The spelling of 245201521 in words is "two hundred forty-five million, two hundred one thousand, five hundred twenty-one".