1340252665 has 16 divisors (see below), whose sum is σ = 1723592448. Its totient is φ = 997862976.

The previous prime is 1340252651. The next prime is 1340252671. The reversal of 1340252665 is 5662520431.

It is a cyclic number.

It is not a de Polignac number, because 1340252665 - 2⁵ = 1340252633 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 1340252665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153237 + ... + 161746.

It is an arithmetic number, because the mean of its divisors is an integer number (107724528).

Almost surely, 2^1340252665 is an apocalyptic number.

It is an amenable number.

1340252665 is a deficient number, since it is larger than the sum of its proper divisors (383339783).

1340252665 is a wasteful number, since it uses less digits than its factorization.

1340252665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315048.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 1340252665 is about 36609.4614136838. The cubic root of 1340252665 is about 1102.5430597655.

The spelling of 1340252665 in words is "one billion, three hundred forty million, two hundred fifty-two thousand, six hundred sixty-five".