1288465645 has 16 divisors (see below), whose sum is σ = 1566848448. Its totient is φ = 1017057280.

The previous prime is 1288465637. The next prime is 1288465657. The reversal of 1288465645 is 5465648821.

It is not a de Polignac number, because 1288465645 - 2³ = 1288465637 is a prime.

It is a super-3 number, since 3×1288465645³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132810 + ... + 142180.

It is an arithmetic number, because the mean of its divisors is an integer number (97928028).

Almost surely, 2^1288465645 is an apocalyptic number.

It is an amenable number.

1288465645 is a deficient number, since it is larger than the sum of its proper divisors (278382803).

1288465645 is a wasteful number, since it uses less digits than its factorization.

1288465645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740.

The product of its digits is 1843200, while the sum is 49.

The square root of 1288465645 is about 35895.2036489557. The cubic root of 1288465645 is about 1088.1554655136.

The spelling of 1288465645 in words is "one billion, two hundred eighty-eight million, four hundred sixty-five thousand, six hundred forty-five".