1155261534 has 24 divisors (see below), whose sum is σ = 2687752008. Its totient is φ = 330074640.

The previous prime is 1155261491. The next prime is 1155261587. The reversal of 1155261534 is 4351625511.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1155261495 and 1155261504.

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 11 ways as a sum of consecutive naturals, for example, 1964437 + ... + 1965024.

It is an arithmetic number, because the mean of its divisors is an integer number (111989667).

Almost surely, 2^1155261534 is an apocalyptic number.

1155261534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1155261534 is an abundant number, since it is smaller than the sum of its proper divisors (1532490474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155261534 is a wasteful number, since it uses less digits than its factorization.

1155261534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929480 (or 3929473 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 1155261534 is about 33989.1384709881. The cubic root of 1155261534 is about 1049.2849353638.

The spelling of 1155261534 in words is "one billion, one hundred fifty-five million, two hundred sixty-one thousand, five hundred thirty-four".