1340252345 has 4 divisors (see below), whose sum is σ = 1608302820. Its totient is φ = 1072201872.

The previous prime is 1340252339. The next prime is 1340252351. The reversal of 1340252345 is 5432520431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1340252339) and next prime (1340252351).

It can be written as a sum of positive squares in 2 ways, for example, as 790959376 + 549292969 = 28124^2 + 23437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340252345 - 2⁶ = 1340252281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134025230 + ... + 134025239.

It is an arithmetic number, because the mean of its divisors is an integer number (402075705).

Almost surely, 2^1340252345 is an apocalyptic number.

It is an amenable number.

1340252345 is a deficient number, since it is larger than the sum of its proper divisors (268050475).

1340252345 is an equidigital number, since it uses as much as digits as its factorization.

1340252345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268050474.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1340252345 is about 36609.4570432286. The cubic root of 1340252345 is about 1102.5429720174.

Adding to 1340252345 its reverse (5432520431), we get a palindrome (6772772776).

The spelling of 1340252345 in words is "one billion, three hundred forty million, two hundred fifty-two thousand, three hundred forty-five".