240143121 has 6 divisors (see below), whose sum is σ = 346873410. Its totient is φ = 160095408.

The previous prime is 240143047. The next prime is 240143179. The reversal of 240143121 is 121341042.

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 114254721 = 11220^2 + 10689^2 .

It is not a de Polignac number, because 240143121 - 2⁷ = 240142993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240143094 and 240143103.

It is not an unprimeable number, because it can be changed into a prime (240143221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13341276 + ... + 13341293.

It is an arithmetic number, because the mean of its divisors is an integer number (57812235).

Almost surely, 2^240143121 is an apocalyptic number.

It is an amenable number.

240143121 is a deficient number, since it is larger than the sum of its proper divisors (106730289).

240143121 is a wasteful number, since it uses less digits than its factorization.

240143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26682575 (or 26682572 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 240143121 is about 15496.5519067953. The cubic root of 240143121 is about 621.5700072612.

Adding to 240143121 its reverse (121341042), we get a palindrome (361484163).

The spelling of 240143121 in words is "two hundred forty million, one hundred forty-three thousand, one hundred twenty-one".