245402117 has 2 divisors, whose sum is σ = 245402118. Its totient is φ = 245402116.

The previous prime is 245402083. The next prime is 245402149. The reversal of 245402117 is 711204542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227135041 + 18267076 = 15071^2 + 4274^2 .

It is a cyclic number.

It is not a de Polignac number, because 245402117 - 2²⁶ = 178293253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245402177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122701058 + 122701059.

It is an arithmetic number, because the mean of its divisors is an integer number (122701059).

Almost surely, 2^245402117 is an apocalyptic number.

It is an amenable number.

245402117 is a deficient number, since it is larger than the sum of its proper divisors (1).

245402117 is an equidigital number, since it uses as much as digits as its factorization.

245402117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 245402117 is about 15665.3157325347. The cubic root of 245402117 is about 626.0746244062.

Adding to 245402117 its reverse (711204542), we get a palindrome (956606659).

The spelling of 245402117 in words is "two hundred forty-five million, four hundred two thousand, one hundred seventeen".