245251957 has 2 divisors, whose sum is σ = 245251958. Its totient is φ = 245251956.

The previous prime is 245251939. The next prime is 245251973. The reversal of 245251957 is 759152542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243079281 + 2172676 = 15591^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 245251957 - 2¹¹ = 245249909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245251907) 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, 122625978 + 122625979.

It is an arithmetic number, because the mean of its divisors is an integer number (122625979).

Almost surely, 2^245251957 is an apocalyptic number.

It is an amenable number.

245251957 is a deficient number, since it is larger than the sum of its proper divisors (1).

245251957 is an equidigital number, since it uses as much as digits as its factorization.

245251957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 245251957 is about 15660.5222454425. The cubic root of 245251957 is about 625.9469013201.

The spelling of 245251957 in words is "two hundred forty-five million, two hundred fifty-one thousand, nine hundred fifty-seven".