1020240191 has 2 divisors, whose sum is σ = 1020240192. Its totient is φ = 1020240190.

The previous prime is 1020240181. The next prime is 1020240209. The reversal of 1020240191 is 1910420201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020240191 - 2²⁶ = 953131327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020240181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510120095 + 510120096.

It is an arithmetic number, because the mean of its divisors is an integer number (510120096).

Almost surely, 2^1020240191 is an apocalyptic number.

1020240191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020240191 is an equidigital number, since it uses as much as digits as its factorization.

1020240191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1020240191 is about 31941.1989599639. The cubic root of 1020240191 is about 1006.7017169913.

Adding to 1020240191 its reverse (1910420201), we get a palindrome (2930660392).

The spelling of 1020240191 in words is "one billion, twenty million, two hundred forty thousand, one hundred ninety-one".