240129081 has 6 divisors (see below), whose sum is σ = 346853130. Its totient is φ = 160086048.

The previous prime is 240129067. The next prime is 240129089. The reversal of 240129081 is 180921042.

It can be written as a sum of positive squares in only one way, i.e., 179989056 + 60140025 = 13416^2 + 7755^2 .

It is not a de Polignac number, because 240129081 - 2⁹ = 240128569 is a prime.

It is a super-2 number, since 2×240129081² = 115323951083809122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240129089) 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, 13340496 + ... + 13340513.

It is an arithmetic number, because the mean of its divisors is an integer number (57808855).

Almost surely, 2^240129081 is an apocalyptic number.

It is an amenable number.

240129081 is a deficient number, since it is larger than the sum of its proper divisors (106724049).

240129081 is a wasteful number, since it uses less digits than its factorization.

240129081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26681015 (or 26681012 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 240129081 is about 15496.0988961738. The cubic root of 240129081 is about 621.5578936337.

The spelling of 240129081 in words is "two hundred forty million, one hundred twenty-nine thousand, eighty-one".