1165420605 has 8 divisors (see below), whose sum is σ = 1864672992. Its totient is φ = 621557648.

The previous prime is 1165420559. The next prime is 1165420609. The reversal of 1165420605 is 5060245611.

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 1165420605 - 2⁹ = 1165420093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165420609) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38847339 + ... + 38847368.

It is an arithmetic number, because the mean of its divisors is an integer number (233084124).

Almost surely, 2^1165420605 is an apocalyptic number.

1165420605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1165420605 is a deficient number, since it is larger than the sum of its proper divisors (699252387).

1165420605 is an equidigital number, since it uses as much as digits as its factorization.

1165420605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77694715.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1165420605 is about 34138.2572050771. The cubic root of 1165420605 is about 1052.3516768811.

The spelling of 1165420605 in words is "one billion, one hundred sixty-five million, four hundred twenty thousand, six hundred five".