1121862065 has 8 divisors (see below), whose sum is σ = 1346419368. Its totient is φ = 897366400.

The previous prime is 1121862047. The next prime is 1121862067. The reversal of 1121862065 is 5602681211.

It can be written as a sum of positive squares in 4 ways, for example, as 2825761 + 1119036304 = 1681^2 + 33452^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121862065 - 2⁸ = 1121861809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121862067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49499 + ... + 68511.

It is an arithmetic number, because the mean of its divisors is an integer number (168302421).

Almost surely, 2^1121862065 is an apocalyptic number.

It is an amenable number.

1121862065 is a deficient number, since it is larger than the sum of its proper divisors (224557303).

1121862065 is a wasteful number, since it uses less digits than its factorization.

1121862065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30819.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1121862065 is about 33494.2094249140. The cubic root of 1121862065 is about 1039.0740232381.

The spelling of 1121862065 in words is "one billion, one hundred twenty-one million, eight hundred sixty-two thousand, sixty-five".