245260561 has 32 divisors (see below), whose sum is σ = 313786368. Its totient is φ = 186477120.

The previous prime is 245260559. The next prime is 245260567. The reversal of 245260561 is 165062542.

It is a cyclic number.

It is not a de Polignac number, because 245260561 - 2¹ = 245260559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (245260567) 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 31 ways as a sum of consecutive naturals, for example, 640176 + ... + 640558.

It is an arithmetic number, because the mean of its divisors is an integer number (9805824).

Almost surely, 2^245260561 is an apocalyptic number.

It is an amenable number.

245260561 is a deficient number, since it is larger than the sum of its proper divisors (68525807).

245260561 is a wasteful number, since it uses less digits than its factorization.

245260561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 245260561 is about 15660.7969465158. The cubic root of 245260561 is about 625.9542211179.

The spelling of 245260561 in words is "two hundred forty-five million, two hundred sixty thousand, five hundred sixty-one".