1241440139 has 2 divisors, whose sum is σ = 1241440140. Its totient is φ = 1241440138.

The previous prime is 1241440129. The next prime is 1241440141. The reversal of 1241440139 is 9310441421.

It is a strong prime.

It is an emirp because it is prime and its reverse (9310441421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1241440139 - 2¹² = 1241436043 is a prime.

Together with 1241440141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1241440129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620720069 + 620720070.

It is an arithmetic number, because the mean of its divisors is an integer number (620720070).

Almost surely, 2^1241440139 is an apocalyptic number.

1241440139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241440139 is an equidigital number, since it uses as much as digits as its factorization.

1241440139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1241440139 is about 35234.0763892003. The cubic root of 1241440139 is about 1074.7528226366.

The spelling of 1241440139 in words is "one billion, two hundred forty-one million, four hundred forty thousand, one hundred thirty-nine".