145206161 has 4 divisors (see below), whose sum is σ = 150213300. Its totient is φ = 140199024.

The previous prime is 145206157. The next prime is 145206209. The reversal of 145206161 is 161602541.

145206161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 71503936 + 73702225 = 8456^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 145206161 - 2² = 145206157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145206161.

It is not an unprimeable number, because it can be changed into a prime (145206101) 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, 2503526 + ... + 2503583.

It is an arithmetic number, because the mean of its divisors is an integer number (37553325).

Almost surely, 2^145206161 is an apocalyptic number.

It is an amenable number.

145206161 is a deficient number, since it is larger than the sum of its proper divisors (5007139).

145206161 is an equidigital number, since it uses as much as digits as its factorization.

145206161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007138.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 145206161 is about 12050.1519077562. The cubic root of 145206161 is about 525.6076543813.

The spelling of 145206161 in words is "one hundred forty-five million, two hundred six thousand, one hundred sixty-one".