245772961 has 32 divisors (see below), whose sum is σ = 317675520. Its totient is φ = 185068800.

The previous prime is 245772949. The next prime is 245772979. The reversal of 245772961 is 169277542.

It is not a de Polignac number, because 245772961 - 2¹¹ = 245770913 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245772911) 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, 159766 + ... + 161296.

It is an arithmetic number, because the mean of its divisors is an integer number (9927360).

Almost surely, 2^245772961 is an apocalyptic number.

It is an amenable number.

245772961 is a deficient number, since it is larger than the sum of its proper divisors (71902559).

245772961 is a wasteful number, since it uses less digits than its factorization.

245772961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

The product of its digits is 211680, while the sum is 43.

The square root of 245772961 is about 15677.1477316507. The cubic root of 245772961 is about 626.3898338083.

The spelling of 245772961 in words is "two hundred forty-five million, seven hundred seventy-two thousand, nine hundred sixty-one".