245734021 has 8 divisors (see below), whose sum is σ = 265046264. Its totient is φ = 226480320.

The previous prime is 245734007. The next prime is 245734067. The reversal of 245734021 is 120437542.

245734021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 104837121 + 140896900 = 10239^2 + 11870^2 .

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 245734021 - 2⁵ = 245733989 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 (245738021) 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, 5706 + ... + 22891.

It is an arithmetic number, because the mean of its divisors is an integer number (33130783).

Almost surely, 2^245734021 is an apocalyptic number.

It is an amenable number.

245734021 is a deficient number, since it is larger than the sum of its proper divisors (19312243).

245734021 is a wasteful number, since it uses less digits than its factorization.

245734021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29271.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 245734021 is about 15675.9057473564. The cubic root of 245734021 is about 626.3567505535.

The spelling of 245734021 in words is "two hundred forty-five million, seven hundred thirty-four thousand, twenty-one".