1240144289 has 2 divisors, whose sum is σ = 1240144290. Its totient is φ = 1240144288.

The previous prime is 1240144277. The next prime is 1240144349. The reversal of 1240144289 is 9824410421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113356689 + 126787600 = 33367^2 + 11260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240144289 - 2²⁰ = 1239095713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240144249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620072144 + 620072145.

It is an arithmetic number, because the mean of its divisors is an integer number (620072145).

Almost surely, 2^1240144289 is an apocalyptic number.

It is an amenable number.

1240144289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240144289 is an equidigital number, since it uses as much as digits as its factorization.

1240144289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1240144289 is about 35215.6824298493. The cubic root of 1240144289 is about 1074.3787400775.

The spelling of 1240144289 in words is "one billion, two hundred forty million, one hundred forty-four thousand, two hundred eighty-nine".