245111257 has 2 divisors, whose sum is σ = 245111258. Its totient is φ = 245111256.

The previous prime is 245111231. The next prime is 245111261. The reversal of 245111257 is 752111542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238980681 + 6130576 = 15459^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 245111257 - 2²³ = 236722649 is a prime.

It is not a weakly prime, because it can be changed into another prime (245111227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122555628 + 122555629.

It is an arithmetic number, because the mean of its divisors is an integer number (122555629).

Almost surely, 2^245111257 is an apocalyptic number.

It is an amenable number.

245111257 is a deficient number, since it is larger than the sum of its proper divisors (1).

245111257 is an equidigital number, since it uses as much as digits as its factorization.

245111257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 28.

The square root of 245111257 is about 15656.0294136157. The cubic root of 245111257 is about 625.8271774011.

Adding to 245111257 its reverse (752111542), we get a palindrome (997222799).

The spelling of 245111257 in words is "two hundred forty-five million, one hundred eleven thousand, two hundred fifty-seven".