1135278561 has 32 divisors (see below), whose sum is σ = 1620799488. Its totient is φ = 705720960.

The previous prime is 1135278541. The next prime is 1135278563. The reversal of 1135278561 is 1658725311.

It is not a de Polignac number, because 1135278561 - 2¹⁹ = 1134754273 is a prime.

It is a super-2 number, since 2×1135278561² = 2577714822132461442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1135278563) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 246300 + ... + 250866.

It is an arithmetic number, because the mean of its divisors is an integer number (50649984).

Almost surely, 2^1135278561 is an apocalyptic number.

It is an amenable number.

1135278561 is a deficient number, since it is larger than the sum of its proper divisors (485520927).

1135278561 is a wasteful number, since it uses less digits than its factorization.

1135278561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701.

The product of its digits is 50400, while the sum is 39.

The square root of 1135278561 is about 33693.8950108176. The cubic root of 1135278561 is about 1043.1997609138.

The spelling of 1135278561 in words is "one billion, one hundred thirty-five million, two hundred seventy-eight thousand, five hundred sixty-one".