1155161405 has 8 divisors (see below), whose sum is σ = 1406883552. Its totient is φ = 910335888.

The previous prime is 1155161327. The next prime is 1155161443. The reversal of 1155161405 is 5041615511.

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 1155161405 - 2¹⁰ = 1155160381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 1723787 + ... + 1724456.

It is an arithmetic number, because the mean of its divisors is an integer number (175860444).

Almost surely, 2^1155161405 is an apocalyptic number.

It is an amenable number.

1155161405 is a deficient number, since it is larger than the sum of its proper divisors (251722147).

1155161405 is an equidigital number, since it uses as much as digits as its factorization.

1155161405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448315.

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 1155161405 is about 33987.6654832308. The cubic root of 1155161405 is about 1049.2546198945.

Adding to 1155161405 its reverse (5041615511), we get a palindrome (6196776916).

The spelling of 1155161405 in words is "one billion, one hundred fifty-five million, one hundred sixty-one thousand, four hundred five".