245125121 has 2 divisors, whose sum is σ = 245125122. Its totient is φ = 245125120.

The previous prime is 245125109. The next prime is 245125141. The reversal of 245125121 is 121521542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 118810000 = 11239^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 245125121 - 2²⁶ = 178016257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245125141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122562560 + 122562561.

It is an arithmetic number, because the mean of its divisors is an integer number (122562561).

Almost surely, 2^245125121 is an apocalyptic number.

It is an amenable number.

245125121 is a deficient number, since it is larger than the sum of its proper divisors (1).

245125121 is an equidigital number, since it uses as much as digits as its factorization.

245125121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 23.

The square root of 245125121 is about 15656.4721760683. The cubic root of 245125121 is about 625.8389765388.

Adding to 245125121 its reverse (121521542), we get a palindrome (366646663).

It can be divided in two parts, 2451 and 25121, that added together give a palindrome (27572).

The spelling of 245125121 in words is "two hundred forty-five million, one hundred twenty-five thousand, one hundred twenty-one".