1340240545 has 8 divisors (see below), whose sum is σ = 1838044224. Its totient is φ = 919022064.

The previous prime is 1340240497. The next prime is 1340240557. The reversal of 1340240545 is 5450420431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340240545 - 2⁷ = 1340240417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19146259 + ... + 19146328.

It is an arithmetic number, because the mean of its divisors is an integer number (229755528).

Almost surely, 2^1340240545 is an apocalyptic number.

It is an amenable number.

1340240545 is a deficient number, since it is larger than the sum of its proper divisors (497803679).

1340240545 is an equidigital number, since it uses as much as digits as its factorization.

1340240545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38292599.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1340240545 is about 36609.2958823302. The cubic root of 1340240545 is about 1102.5397362971.

Adding to 1340240545 its reverse (5450420431), we get a palindrome (6790660976).

The spelling of 1340240545 in words is "one billion, three hundred forty million, two hundred forty thousand, five hundred forty-five".