1340305541 has 4 divisors (see below), whose sum is σ = 1340378784. Its totient is φ = 1340232300.

The previous prime is 1340305523. The next prime is 1340305573. The reversal of 1340305541 is 1455030431.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340305541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340305541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340301541) 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, 16976 + ... + 54486.

It is an arithmetic number, because the mean of its divisors is an integer number (335094696).

Almost surely, 2^1340305541 is an apocalyptic number.

It is an amenable number.

1340305541 is a deficient number, since it is larger than the sum of its proper divisors (73243).

1340305541 is an equidigital number, since it uses as much as digits as its factorization.

1340305541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73242.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1340305541 is about 36610.1835696026. The cubic root of 1340305541 is about 1102.5575588476.

Adding to 1340305541 its reverse (1455030431), we get a palindrome (2795335972).

The spelling of 1340305541 in words is "one billion, three hundred forty million, three hundred five thousand, five hundred forty-one".