1340757883921 has 9 divisors (see below), whose sum is σ = 1352860023931. Its totient is φ = 1328763083872.

The previous prime is 1340757883903. The next prime is 1340757883939. The reversal of 1340757883921 is 1293887570431.

The square root of 1340757883921 is 1157911.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1340757883903) and next prime (1340757883939).

It can be written as a sum of positive squares in only one way, i.e., 23625227025 + 1317132656896 = 153705^2 + 1147664^2 .

It is not a de Polignac number, because 1340757883921 - 2¹⁷ = 1340757752849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340757883981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 130838820 + ... + 130849066.

Almost surely, 2^{1340757883921} is an apocalyptic number.

1340757883921 is the 1157911-st square number.

1340757883921 is the 578956-th centered octagonal number.

It is an amenable number.

1340757883921 is a deficient number, since it is larger than the sum of its proper divisors (12102140010).

1340757883921 is an frugal number, since it uses more digits than its factorization.

1340757883921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20720 (or 10360 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 1340757883921 in words is "one trillion, three hundred forty billion, seven hundred fifty-seven million, eight hundred eighty-three thousand, nine hundred twenty-one".