1282945665 has 16 divisors (see below), whose sum is σ = 2055658176. Its totient is φ = 683256000.

The previous prime is 1282945639. The next prime is 1282945667. The reversal of 1282945665 is 5665492821.

It is not a de Polignac number, because 1282945665 - 2¹³ = 1282937473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1282945667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50491 + ... + 71520.

It is an arithmetic number, because the mean of its divisors is an integer number (128478636).

Almost surely, 2^1282945665 is an apocalyptic number.

1282945665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1282945665 is a deficient number, since it is larger than the sum of its proper divisors (772712511).

1282945665 is a wasteful number, since it uses less digits than its factorization.

1282945665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122720.

The product of its digits is 1036800, while the sum is 48.

The square root of 1282945665 is about 35818.2309027121. The cubic root of 1282945665 is about 1086.5993007260.

The spelling of 1282945665 in words is "one billion, two hundred eighty-two million, nine hundred forty-five thousand, six hundred sixty-five".