1120651661 has 6 divisors (see below), whose sum is σ = 1132087086. Its totient is φ = 1109223000.

The previous prime is 1120651657. The next prime is 1120651667. The reversal of 1120651661 is 1661560211.

It can be written as a sum of positive squares in only one way, i.e., 1109556100 + 11095561 = 33310^2 + 3331^2 .

It is not a de Polignac number, because 1120651661 - 2² = 1120651657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120651667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334766 + ... + 338096.

It is an arithmetic number, because the mean of its divisors is an integer number (188681181).

Almost surely, 2^1120651661 is an apocalyptic number.

It is an amenable number.

1120651661 is a deficient number, since it is larger than the sum of its proper divisors (11435425).

1120651661 is an frugal number, since it uses more digits than its factorization.

1120651661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6763 (or 3432 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1120651661 is about 33476.1356939537. The cubic root of 1120651661 is about 1038.7001947657.

The spelling of 1120651661 in words is "one billion, one hundred twenty million, six hundred fifty-one thousand, six hundred sixty-one".