240162721 has 2 divisors, whose sum is σ = 240162722. Its totient is φ = 240162720.

The previous prime is 240162701. The next prime is 240162737. The reversal of 240162721 is 127261042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210569121 + 29593600 = 14511^2 + 5440^2 .

It is a cyclic number.

It is not a de Polignac number, because 240162721 - 2¹⁹ = 239638433 is a prime.

It is not a weakly prime, because it can be changed into another prime (240162701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120081360 + 120081361.

It is an arithmetic number, because the mean of its divisors is an integer number (120081361).

Almost surely, 2^240162721 is an apocalyptic number.

It is an amenable number.

240162721 is a deficient number, since it is larger than the sum of its proper divisors (1).

240162721 is an equidigital number, since it uses as much as digits as its factorization.

240162721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 240162721 is about 15497.1842926385. The cubic root of 240162721 is about 621.5869172337.

The spelling of 240162721 in words is "two hundred forty million, one hundred sixty-two thousand, seven hundred twenty-one".