1120653865 has 16 divisors (see below), whose sum is σ = 1354525200. Its totient is φ = 890053632.

The previous prime is 1120653823. The next prime is 1120653869. The reversal of 1120653865 is 5683560211.

It can be written as a sum of positive squares in 8 ways, for example, as 14160169 + 1106493696 = 3763^2 + 33264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120653865 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1120653869) 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, 467109 + ... + 469501.

It is an arithmetic number, because the mean of its divisors is an integer number (84657825).

Almost surely, 2^1120653865 is an apocalyptic number.

It is an amenable number.

1120653865 is a deficient number, since it is larger than the sum of its proper divisors (233871335).

1120653865 is a wasteful number, since it uses less digits than its factorization.

1120653865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1120653865 is about 33476.1686129103. The cubic root of 1120653865 is about 1038.7008757069.

The spelling of 1120653865 in words is "one billion, one hundred twenty million, six hundred fifty-three thousand, eight hundred sixty-five".