1161601005 has 32 divisors (see below), whose sum is σ = 1998028800. Its totient is φ = 574420032.

The previous prime is 1161600983. The next prime is 1161601013. The reversal of 1161601005 is 5001061611.

It is not a de Polignac number, because 1161601005 - 2⁶ = 1161600941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29965 + ... + 56754.

It is an arithmetic number, because the mean of its divisors is an integer number (62438400).

Almost surely, 2^1161601005 is an apocalyptic number.

1161601005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161601005 is a deficient number, since it is larger than the sum of its proper divisors (836427795).

1161601005 is a wasteful number, since it uses less digits than its factorization.

1161601005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86793.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1161601005 is about 34082.2681903655. The cubic root of 1161601005 is about 1051.2007442601.

Adding to 1161601005 its reverse (5001061611), we get a palindrome (6162662616).

The spelling of 1161601005 in words is "one billion, one hundred sixty-one million, six hundred one thousand, five".