1340425771 has 4 divisors (see below), whose sum is σ = 1383665344. Its totient is φ = 1297186200.

The previous prime is 1340425747. The next prime is 1340425777. The reversal of 1340425771 is 1775240431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1775240431 = 47 ⋅37771073.

It is a cyclic number.

It is not a de Polignac number, because 1340425771 - 2⁵ = 1340425739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340425777) 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 in 3 ways as a sum of consecutive naturals, for example, 21619740 + ... + 21619801.

It is an arithmetic number, because the mean of its divisors is an integer number (345916336).

Almost surely, 2^1340425771 is an apocalyptic number.

1340425771 is a deficient number, since it is larger than the sum of its proper divisors (43239573).

1340425771 is an equidigital number, since it uses as much as digits as its factorization.

1340425771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43239572.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1340425771 is about 36611.8255622415. The cubic root of 1340425771 is about 1102.5905255923.

The spelling of 1340425771 in words is "one billion, three hundred forty million, four hundred twenty-five thousand, seven hundred seventy-one".