1340039461 has 2 divisors, whose sum is σ = 1340039462. Its totient is φ = 1340039460.

The previous prime is 1340039423. The next prime is 1340039497. The reversal of 1340039461 is 1649300431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019844225 + 320195236 = 31935^2 + 17894^2 .

It is an emirp because it is prime and its reverse (1649300431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340039461 - 2¹⁷ = 1339908389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340039411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670019730 + 670019731.

It is an arithmetic number, because the mean of its divisors is an integer number (670019731).

Almost surely, 2^1340039461 is an apocalyptic number.

It is an amenable number.

1340039461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340039461 is an equidigital number, since it uses as much as digits as its factorization.

1340039461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1340039461 is about 36606.5494276639. The cubic root of 1340039461 is about 1102.4845934125.

Adding to 1340039461 its reverse (1649300431), we get a palindrome (2989339892).

The spelling of 1340039461 in words is "one billion, three hundred forty million, thirty-nine thousand, four hundred sixty-one".