245858161 has 4 divisors (see below), whose sum is σ = 249321024. Its totient is φ = 242395300.

The previous prime is 245858141. The next prime is 245858177. The reversal of 245858161 is 161858542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245858161 - 2¹³ = 245849969 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245858141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731325 + ... + 1731466.

It is an arithmetic number, because the mean of its divisors is an integer number (62330256).

Almost surely, 2^245858161 is an apocalyptic number.

It is an amenable number.

245858161 is a deficient number, since it is larger than the sum of its proper divisors (3462863).

245858161 is an equidigital number, since it uses as much as digits as its factorization.

245858161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462862.

The product of its digits is 76800, while the sum is 40.

The square root of 245858161 is about 15679.8648272235. The cubic root of 245858161 is about 626.4622071725.

The spelling of 245858161 in words is "two hundred forty-five million, eight hundred fifty-eight thousand, one hundred sixty-one".