1340240141 has 4 divisors (see below), whose sum is σ = 1340327484. Its totient is φ = 1340152800.

The previous prime is 1340240131. The next prime is 1340240189. The reversal of 1340240141 is 1410420431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1410420431 = 7 ⋅201488633.

It can be written as a sum of positive squares in 2 ways, for example, as 640849225 + 699390916 = 25315^2 + 26446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340240141 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 (1340240131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13880 + ... + 53601.

It is an arithmetic number, because the mean of its divisors is an integer number (335081871).

Almost surely, 2^1340240141 is an apocalyptic number.

It is an amenable number.

1340240141 is a deficient number, since it is larger than the sum of its proper divisors (87343).

1340240141 is an equidigital number, since it uses as much as digits as its factorization.

1340240141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87342.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1340240141 is about 36609.2903646055. The cubic root of 1340240141 is about 1102.5396255145.

Adding to 1340240141 its reverse (1410420431), we get a palindrome (2750660572).

The spelling of 1340240141 in words is "one billion, three hundred forty million, two hundred forty thousand, one hundred forty-one".