245660761 has 4 divisors (see below), whose sum is σ = 260111412. Its totient is φ = 231210112.

The previous prime is 245660749. The next prime is 245660783. The reversal of 245660761 is 167066542.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145660761 + 100000000 = 12069^2 + 10000^2 .

It is a cyclic number.

It is not a de Polignac number, because 245660761 - 2⁹ = 245660249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245660761.

It is not an unprimeable number, because it can be changed into a prime (245660741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7225300 + ... + 7225333.

It is an arithmetic number, because the mean of its divisors is an integer number (65027853).

Almost surely, 2^245660761 is an apocalyptic number.

It is an amenable number.

245660761 is a deficient number, since it is larger than the sum of its proper divisors (14450651).

245660761 is a wasteful number, since it uses less digits than its factorization.

245660761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450650.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 245660761 is about 15673.5688660879. The cubic root of 245660761 is about 626.2944997018.

The spelling of 245660761 in words is "two hundred forty-five million, six hundred sixty thousand, seven hundred sixty-one".