245772257 has 2 divisors, whose sum is σ = 245772258. Its totient is φ = 245772256.

The previous prime is 245772223. The next prime is 245772283. The reversal of 245772257 is 752277542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165920161 + 79852096 = 12881^2 + 8936^2 .

It is a cyclic number.

It is not a de Polignac number, because 245772257 - 2¹² = 245768161 is a prime.

It is not a weakly prime, because it can be changed into another prime (245772217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122886128 + 122886129.

It is an arithmetic number, because the mean of its divisors is an integer number (122886129).

Almost surely, 2^245772257 is an apocalyptic number.

It is an amenable number.

245772257 is a deficient number, since it is larger than the sum of its proper divisors (1).

245772257 is an equidigital number, since it uses as much as digits as its factorization.

245772257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274400, while the sum is 41.

The square root of 245772257 is about 15677.1252785707. The cubic root of 245772257 is about 626.3892357239.

The spelling of 245772257 in words is "two hundred forty-five million, seven hundred seventy-two thousand, two hundred fifty-seven".