1161555434 has 16 divisors (see below), whose sum is σ = 1881780768. Its totient is φ = 534553392.

The previous prime is 1161555427. The next prime is 1161555463. The reversal of 1161555434 is 4345551611.

It is a super-2 number, since 2×1161555434² = 2698422052509856712, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1161555394 and 1161555403.

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 7 ways as a sum of consecutive naturals, for example, 55352 + ... + 73395.

It is an arithmetic number, because the mean of its divisors is an integer number (117611298).

Almost surely, 2^1161555434 is an apocalyptic number.

1161555434 is a deficient number, since it is larger than the sum of its proper divisors (720225334).

1161555434 is a wasteful number, since it uses less digits than its factorization.

1161555434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129109.

The product of its digits is 36000, while the sum is 35.

The square root of 1161555434 is about 34081.5996396883. The cubic root of 1161555434 is about 1051.1869974586.

The spelling of 1161555434 in words is "one billion, one hundred sixty-one million, five hundred fifty-five thousand, four hundred thirty-four".