1340250161 has 2 divisors, whose sum is σ = 1340250162. Its totient is φ = 1340250160.

The previous prime is 1340250133. The next prime is 1340250169. The reversal of 1340250161 is 1610520431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1337291761 + 2958400 = 36569^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340250161 - 2¹⁰ = 1340249137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340250169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670125080 + 670125081.

It is an arithmetic number, because the mean of its divisors is an integer number (670125081).

Almost surely, 2^1340250161 is an apocalyptic number.

It is an amenable number.

1340250161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340250161 is an equidigital number, since it uses as much as digits as its factorization.

1340250161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1340250161 is about 36609.4272148582. The cubic root of 1340250161 is about 1102.5423731364.

Adding to 1340250161 its reverse (1610520431), we get a palindrome (2950770592).

The spelling of 1340250161 in words is "one billion, three hundred forty million, two hundred fifty thousand, one hundred sixty-one".