1340150261 has 2 divisors, whose sum is σ = 1340150262. Its totient is φ = 1340150260.

The previous prime is 1340150257. The next prime is 1340150263. The reversal of 1340150261 is 1620510431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 707879236 + 632271025 = 26606^2 + 25145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340150261 - 2² = 1340150257 is a prime.

Together with 1340150263, 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 (1340150263) 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, 670075130 + 670075131.

It is an arithmetic number, because the mean of its divisors is an integer number (670075131).

Almost surely, 2^1340150261 is an apocalyptic number.

It is an amenable number.

1340150261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340150261 is an equidigital number, since it uses as much as digits as its factorization.

1340150261 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 1340150261 is about 36608.0627867687. The cubic root of 1340150261 is about 1102.5149785691.

Adding to 1340150261 its reverse (1620510431), we get a palindrome (2960660692).

The spelling of 1340150261 in words is "one billion, three hundred forty million, one hundred fifty thousand, two hundred sixty-one".