245121133 has 2 divisors, whose sum is σ = 245121134. Its totient is φ = 245121132.

The previous prime is 245121103. The next prime is 245121167. The reversal of 245121133 is 331121542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167909764 + 77211369 = 12958^2 + 8787^2 .

It is a cyclic number.

It is not a de Polignac number, because 245121133 - 2⁵ = 245121101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245121103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122560566 + 122560567.

It is an arithmetic number, because the mean of its divisors is an integer number (122560567).

Almost surely, 2^245121133 is an apocalyptic number.

It is an amenable number.

245121133 is a deficient number, since it is larger than the sum of its proper divisors (1).

245121133 is an equidigital number, since it uses as much as digits as its factorization.

245121133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 245121133 is about 15656.3448160802. The cubic root of 245121133 is about 625.8355825451.

Adding to 245121133 its reverse (331121542), we get a palindrome (576242675).

The spelling of 245121133 in words is "two hundred forty-five million, one hundred twenty-one thousand, one hundred thirty-three".