1165642105 has 8 divisors (see below), whose sum is σ = 1405872072. Its totient is φ = 927779328.

The previous prime is 1165642103. The next prime is 1165642141. The reversal of 1165642105 is 5012465611.

It can be written as a sum of positive squares in 4 ways, for example, as 229098496 + 936543609 = 15136^2 + 30603^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1165642105 - 2¹ = 1165642103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165642103) 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, 590712 + ... + 592681.

It is an arithmetic number, because the mean of its divisors is an integer number (175734009).

Almost surely, 2^1165642105 is an apocalyptic number.

It is an amenable number.

1165642105 is a deficient number, since it is larger than the sum of its proper divisors (240229967).

1165642105 is a wasteful number, since it uses less digits than its factorization.

1165642105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183595.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1165642105 is about 34141.5012118682. The cubic root of 1165642105 is about 1052.4183426924.

The spelling of 1165642105 in words is "one billion, one hundred sixty-five million, six hundred forty-two thousand, one hundred five".