1340455141 has 4 divisors (see below), whose sum is σ = 1340528800. Its totient is φ = 1340381484.

The previous prime is 1340455121. The next prime is 1340455169. The reversal of 1340455141 is 1415540431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1415540431 = 29 ⋅48811739.

It is a cyclic number.

It is not a de Polignac number, because 1340455141 - 2⁷ = 1340455013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340455121) 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 3 ways as a sum of consecutive naturals, for example, 12430 + ... + 53248.

It is an arithmetic number, because the mean of its divisors is an integer number (335132200).

Almost surely, 2^1340455141 is an apocalyptic number.

It is an amenable number.

1340455141 is a deficient number, since it is larger than the sum of its proper divisors (73659).

1340455141 is an equidigital number, since it uses as much as digits as its factorization.

1340455141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73658.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1340455141 is about 36612.2266599561. The cubic root of 1340455141 is about 1102.5985784682.

Adding to 1340455141 its reverse (1415540431), we get a palindrome (2755995572).

The spelling of 1340455141 in words is "one billion, three hundred forty million, four hundred fifty-five thousand, one hundred forty-one".