1020246191 has 2 divisors, whose sum is σ = 1020246192. Its totient is φ = 1020246190.

The previous prime is 1020246127. The next prime is 1020246193. The reversal of 1020246191 is 1916420201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020246191 - 2⁶ = 1020246127 is a prime.

It is a Sophie Germain prime.

Together with 1020246193, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020246191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020246193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510123095 + 510123096.

It is an arithmetic number, because the mean of its divisors is an integer number (510123096).

Almost surely, 2^1020246191 is an apocalyptic number.

1020246191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020246191 is an equidigital number, since it uses as much as digits as its factorization.

1020246191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1020246191 is about 31941.2928824116. The cubic root of 1020246191 is about 1006.7036904476.

Adding to 1020246191 its reverse (1916420201), we get a palindrome (2936666392).

The spelling of 1020246191 in words is "one billion, twenty million, two hundred forty-six thousand, one hundred ninety-one".