245045161 has 4 divisors (see below), whose sum is σ = 245283412. Its totient is φ = 244806912.

The previous prime is 245045149. The next prime is 245045167. The reversal of 245045161 is 161540542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216090000 + 28955161 = 14700^2 + 5381^2 .

It is a cyclic number.

It is not a de Polignac number, because 245045161 - 2²¹ = 242948009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245045167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117576 + ... + 119641.

It is an arithmetic number, because the mean of its divisors is an integer number (61320853).

Almost surely, 2^245045161 is an apocalyptic number.

It is an amenable number.

245045161 is a deficient number, since it is larger than the sum of its proper divisors (238251).

245045161 is a wasteful number, since it uses less digits than its factorization.

245045161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238250.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 245045161 is about 15653.9183912527. The cubic root of 245045161 is about 625.7709194222.

The spelling of 245045161 in words is "two hundred forty-five million, forty-five thousand, one hundred sixty-one".