1232161605 has 96 divisors (see below), whose sum is σ = 2309731200. Its totient is φ = 622992384.

The previous prime is 1232161577. The next prime is 1232161607. The reversal of 1232161605 is 5061612321.

1232161605 is a `hidden beast` number, since 1 + 23 + 21 + 616 + 0 + 5 = 666.

It is not a de Polignac number, because 1232161605 - 2⁵ = 1232161573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232161607) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10904029 + ... + 10904141.

It is an arithmetic number, because the mean of its divisors is an integer number (24059700).

Almost surely, 2^1232161605 is an apocalyptic number.

1232161605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1232161605 is a deficient number, since it is larger than the sum of its proper divisors (1077569595).

1232161605 is a wasteful number, since it uses less digits than its factorization.

1232161605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1232161605 is about 35102.1595489508. The cubic root of 1232161605 is about 1072.0685535376.

Adding to 1232161605 its reverse (5061612321), we get a palindrome (6293773926).

The spelling of 1232161605 in words is "one billion, two hundred thirty-two million, one hundred sixty-one thousand, six hundred five".