245745281 has 8 divisors (see below), whose sum is σ = 253200384. Its totient is φ = 238383040.

The previous prime is 245745263. The next prime is 245745293. The reversal of 245745281 is 182547542.

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 245745281 - 2²⁶ = 178636417 is a prime.

It is a super-2 number, since 2×245745281² = 120781486267537922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245741281) 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, 17825 + ... + 28446.

It is an arithmetic number, because the mean of its divisors is an integer number (31650048).

Almost surely, 2^245745281 is an apocalyptic number.

It is an amenable number.

245745281 is a deficient number, since it is larger than the sum of its proper divisors (7455103).

245745281 is a wasteful number, since it uses less digits than its factorization.

245745281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46431.

The product of its digits is 89600, while the sum is 38.

The square root of 245745281 is about 15676.2648931434. The cubic root of 245745281 is about 626.3663173598.

The spelling of 245745281 in words is "two hundred forty-five million, seven hundred forty-five thousand, two hundred eighty-one".