1040242991 has 2 divisors, whose sum is σ = 1040242992. Its totient is φ = 1040242990.

The previous prime is 1040242969. The next prime is 1040242993. The reversal of 1040242991 is 1992420401.

1040242991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040242991 is a prime.

Together with 1040242993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040242993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520121495 + 520121496.

It is an arithmetic number, because the mean of its divisors is an integer number (520121496).

Almost surely, 2^1040242991 is an apocalyptic number.

1040242991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040242991 is an equidigital number, since it uses as much as digits as its factorization.

1040242991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1040242991 is about 32252.7981886843. The cubic root of 1040242991 is about 1013.2383042835.

The spelling of 1040242991 in words is "one billion, forty million, two hundred forty-two thousand, nine hundred ninety-one".