1140355421 has 2 divisors, whose sum is σ = 1140355422. Its totient is φ = 1140355420.

The previous prime is 1140355339. The next prime is 1140355423. The reversal of 1140355421 is 1245530411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1097596900 + 42758521 = 33130^2 + 6539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140355421 - 2¹⁴ = 1140339037 is a prime.

Together with 1140355423, 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 (1140355423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570177710 + 570177711.

It is an arithmetic number, because the mean of its divisors is an integer number (570177711).

Almost surely, 2^1140355421 is an apocalyptic number.

It is an amenable number.

1140355421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140355421 is an equidigital number, since it uses as much as digits as its factorization.

1140355421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1140355421 is about 33769.1489528534. The cubic root of 1140355421 is about 1044.7524793983.

Adding to 1140355421 its reverse (1245530411), we get a palindrome (2385885832).

The spelling of 1140355421 in words is "one billion, one hundred forty million, three hundred fifty-five thousand, four hundred twenty-one".