240506129 has 2 divisors, whose sum is σ = 240506130. Its totient is φ = 240506128.

The previous prime is 240506111. The next prime is 240506131. The reversal of 240506129 is 921605042.

It is a happy number.

240506129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229583104 + 10923025 = 15152^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 240506129 - 2²⁴ = 223728913 is a prime.

Together with 240506131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240506729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120253064 + 120253065.

It is an arithmetic number, because the mean of its divisors is an integer number (120253065).

Almost surely, 2^240506129 is an apocalyptic number.

It is an amenable number.

240506129 is a deficient number, since it is larger than the sum of its proper divisors (1).

240506129 is an equidigital number, since it uses as much as digits as its factorization.

240506129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 240506129 is about 15508.2600249029. The cubic root of 240506129 is about 621.8830445968.

The spelling of 240506129 in words is "two hundred forty million, five hundred six thousand, one hundred twenty-nine".