240660521 has 2 divisors, whose sum is σ = 240660522. Its totient is φ = 240660520.

The previous prime is 240660509. The next prime is 240660547. The reversal of 240660521 is 125066042.

It is an a-pointer prime, because the next prime (240660547) can be obtained adding 240660521 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239135296 + 1525225 = 15464^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 240660521 - 2¹⁴ = 240644137 is a prime.

It is not a weakly prime, because it can be changed into another prime (240630521) 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 as a sum of consecutive naturals, namely, 120330260 + 120330261.

It is an arithmetic number, because the mean of its divisors is an integer number (120330261).

Almost surely, 2^240660521 is an apocalyptic number.

It is an amenable number.

240660521 is a deficient number, since it is larger than the sum of its proper divisors (1).

240660521 is an equidigital number, since it uses as much as digits as its factorization.

240660521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 240660521 is about 15513.2369607378. The cubic root of 240660521 is about 622.0160879549.

The spelling of 240660521 in words is "two hundred forty million, six hundred sixty thousand, five hundred twenty-one".