240006161 has 4 divisors (see below), whose sum is σ = 246492852. Its totient is φ = 233519472.

The previous prime is 240006131. The next prime is 240006191. The reversal of 240006161 is 161600042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161600042 = 2 ⋅80800021.

It is an interprime number because it is at equal distance from previous prime (240006131) and next prime (240006191).

It can be written as a sum of positive squares in 2 ways, for example, as 198274561 + 41731600 = 14081^2 + 6460^2 .

It is a cyclic number.

It is not a de Polignac number, because 240006161 - 2⁶ = 240006097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240006121) 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, 3243290 + ... + 3243363.

It is an arithmetic number, because the mean of its divisors is an integer number (61623213).

Almost surely, 2^240006161 is an apocalyptic number.

It is an amenable number.

240006161 is a deficient number, since it is larger than the sum of its proper divisors (6486691).

240006161 is an equidigital number, since it uses as much as digits as its factorization.

240006161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486690.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 240006161 is about 15492.1322289735. The cubic root of 240006161 is about 621.4518188285.

The spelling of 240006161 in words is "two hundred forty million, six thousand, one hundred sixty-one".