245242161 has 28 divisors (see below), whose sum is σ = 369123588. Its totient is φ = 162860544.

The previous prime is 245242159. The next prime is 245242163. The reversal of 245242161 is 161242542.

245242161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (245242159) and next prime (245242163).

It can be written as a sum of positive squares in 2 ways, for example, as 100881936 + 144360225 = 10044^2 + 12015^2 .

It is not a de Polignac number, because 245242161 - 2¹ = 245242159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245242163) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 256861 + ... + 257813.

Almost surely, 2^245242161 is an apocalyptic number.

It is an amenable number.

245242161 is a deficient number, since it is larger than the sum of its proper divisors (123881427).

245242161 is an frugal number, since it uses more digits than its factorization.

245242161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1309 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 245242161 is about 15660.2094813575. The cubic root of 245242161 is about 625.9385672276.

The spelling of 245242161 in words is "two hundred forty-five million, two hundred forty-two thousand, one hundred sixty-one".