242161361 has 4 divisors (see below), whose sum is σ = 260789172. Its totient is φ = 223533552.

The previous prime is 242161291. The next prime is 242161363. The reversal of 242161361 is 163161242.

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 31360000 + 210801361 = 5600^2 + 14519^2 .

It is a cyclic number.

It is not a de Polignac number, because 242161361 - 2¹⁰ = 242160337 is a prime.

It is a super-2 number, since 2×242161361² = 117284249522744642, which contains 22 as substring.

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 242161361.

It is not an unprimeable number, because it can be changed into a prime (242161363) 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, 9313886 + ... + 9313911.

It is an arithmetic number, because the mean of its divisors is an integer number (65197293).

Almost surely, 2^242161361 is an apocalyptic number.

It is an amenable number.

242161361 is a deficient number, since it is larger than the sum of its proper divisors (18627811).

242161361 is a wasteful number, since it uses less digits than its factorization.

242161361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18627810.

The product of its digits is 1728, while the sum is 26.

The square root of 242161361 is about 15561.5346608231. The cubic root of 242161361 is about 623.3064431828.

The spelling of 242161361 in words is "two hundred forty-two million, one hundred sixty-one thousand, three hundred sixty-one".