245310561 has 12 divisors (see below), whose sum is σ = 375181092. Its totient is φ = 153920256.

The previous prime is 245310557. The next prime is 245310589. The reversal of 245310561 is 165013542.

245310561 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 2 ways, for example, as 82901025 + 162409536 = 9105^2 + 12744^2 .

It is not a de Polignac number, because 245310561 - 2² = 245310557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245310511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801516 + ... + 801821.

It is an arithmetic number, because the mean of its divisors is an integer number (31265091).

Almost surely, 2^245310561 is an apocalyptic number.

It is an amenable number.

245310561 is a deficient number, since it is larger than the sum of its proper divisors (129870531).

245310561 is a wasteful number, since it uses less digits than its factorization.

245310561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603360 (or 1603357 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 245310561 is about 15662.3932079360. The cubic root of 245310561 is about 625.9967549091.

The spelling of 245310561 in words is "two hundred forty-five million, three hundred ten thousand, five hundred sixty-one".