4240091 has 2 divisors, whose sum is σ = 4240092. Its totient is φ = 4240090.

The previous prime is 4240079. The next prime is 4240109. The reversal of 4240091 is 1900424.

Together with next prime (4240109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4240091 - 2¹⁸ = 3977947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (4240991) 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, 2120045 + 2120046.

It is an arithmetic number, because the mean of its divisors is an integer number (2120046).

Almost surely, 2^4240091 is an apocalyptic number.

4240091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240091 is an equidigital number, since it uses as much as digits as its factorization.

4240091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4240091 is about 2059.1481248322. The cubic root of 4240091 is about 161.8546045969.

The spelling of 4240091 in words is "four million, two hundred forty thousand, ninety-one".