240241409 has 2 divisors, whose sum is σ = 240241410. Its totient is φ = 240241408.

The previous prime is 240241373. The next prime is 240241411. The reversal of 240241409 is 904142042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173001409 + 67240000 = 13153^2 + 8200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240241409 is a prime.

Together with 240241411, 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 (240241439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120120704 + 120120705.

It is an arithmetic number, because the mean of its divisors is an integer number (120120705).

Almost surely, 2^240241409 is an apocalyptic number.

It is an amenable number.

240241409 is a deficient number, since it is larger than the sum of its proper divisors (1).

240241409 is an equidigital number, since it uses as much as digits as its factorization.

240241409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 240241409 is about 15499.7228684903. The cubic root of 240241409 is about 621.6547963370.

The spelling of 240241409 in words is "two hundred forty million, two hundred forty-one thousand, four hundred nine".