245081657 has 2 divisors, whose sum is σ = 245081658. Its totient is φ = 245081656.

The previous prime is 245081647. The next prime is 245081687. The reversal of 245081657 is 756180542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244734736 + 346921 = 15644^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 245081657 - 2¹⁴ = 245065273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245081657.

It is not a weakly prime, because it can be changed into another prime (245081647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122540828 + 122540829.

It is an arithmetic number, because the mean of its divisors is an integer number (122540829).

Almost surely, 2^245081657 is an apocalyptic number.

It is an amenable number.

245081657 is a deficient number, since it is larger than the sum of its proper divisors (1).

245081657 is an equidigital number, since it uses as much as digits as its factorization.

245081657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 245081657 is about 15655.0840623741. The cubic root of 245081657 is about 625.8019844467.

The spelling of 245081657 in words is "two hundred forty-five million, eighty-one thousand, six hundred fifty-seven".