245304401261 has 2 divisors, whose sum is σ = 245304401262. Its totient is φ = 245304401260.

The previous prime is 245304401249. The next prime is 245304401333. The reversal of 245304401261 is 162104403542.

245304401261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218901401161 + 26403000100 = 467869^2 + 162490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245304401261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245304401201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122652200630 + 122652200631.

It is an arithmetic number, because the mean of its divisors is an integer number (122652200631).

Almost surely, 2^245304401261 is an apocalyptic number.

It is an amenable number.

245304401261 is a deficient number, since it is larger than the sum of its proper divisors (1).

245304401261 is an equidigital number, since it uses as much as digits as its factorization.

245304401261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 245304401261 in words is "two hundred forty-five billion, three hundred four million, four hundred one thousand, two hundred sixty-one".