245166121 has 2 divisors, whose sum is σ = 245166122. Its totient is φ = 245166120.

The previous prime is 245166113. The next prime is 245166149. The reversal of 245166121 is 121661542.

245166121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (245166149) can be obtained adding 245166121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229674025 + 15492096 = 15155^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 245166121 - 2³ = 245166113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245166121.

It is not a weakly prime, because it can be changed into another prime (245166191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122583060 + 122583061.

It is an arithmetic number, because the mean of its divisors is an integer number (122583061).

Almost surely, 2^245166121 is an apocalyptic number.

It is an amenable number.

245166121 is a deficient number, since it is larger than the sum of its proper divisors (1).

245166121 is an equidigital number, since it uses as much as digits as its factorization.

245166121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 245166121 is about 15657.7814839779. The cubic root of 245166121 is about 625.8738675194.

The spelling of 245166121 in words is "two hundred forty-five million, one hundred sixty-six thousand, one hundred twenty-one".