1240144349 has 2 divisors, whose sum is σ = 1240144350. Its totient is φ = 1240144348.

The previous prime is 1240144289. The next prime is 1240144351. The reversal of 1240144349 is 9434410421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871312324 + 368832025 = 29518^2 + 19205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240144349 - 2²⁸ = 971708893 is a prime.

Together with 1240144351, 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 (1240144249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620072174 + 620072175.

It is an arithmetic number, because the mean of its divisors is an integer number (620072175).

Almost surely, 2^1240144349 is an apocalyptic number.

It is an amenable number.

1240144349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240144349 is an equidigital number, since it uses as much as digits as its factorization.

1240144349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1240144349 is about 35215.6832817425. The cubic root of 1240144349 is about 1074.3787574042.

The spelling of 1240144349 in words is "one billion, two hundred forty million, one hundred forty-four thousand, three hundred forty-nine".