1000240291 has 2 divisors, whose sum is σ = 1000240292. Its totient is φ = 1000240290.

The previous prime is 1000240289. The next prime is 1000240303. The reversal of 1000240291 is 1920420001.

It is a weak prime.

It is an emirp because it is prime and its reverse (1920420001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000240291 - 2¹ = 1000240289 is a prime.

Together with 1000240289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1000240211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500120145 + 500120146.

It is an arithmetic number, because the mean of its divisors is an integer number (500120146).

Almost surely, 2^1000240291 is an apocalyptic number.

1000240291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000240291 is an equidigital number, since it uses as much as digits as its factorization.

1000240291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1000240291 is about 31626.5757077809. The cubic root of 1000240291 is about 1000.0800905853.

Adding to 1000240291 its reverse (1920420001), we get a palindrome (2920660292).

The spelling of 1000240291 in words is "one billion, two hundred forty thousand, two hundred ninety-one".