1091258545 has 16 divisors (see below), whose sum is σ = 1458873360. Its totient is φ = 778063104.

The previous prime is 1091258507. The next prime is 1091258557. The reversal of 1091258545 is 5458521901.

It can be written as a sum of positive squares in 8 ways, for example, as 351037696 + 740220849 = 18736^2 + 27207^2 .

It is not a de Polignac number, because 1091258545 - 2¹⁹ = 1090734257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1091258498 and 1091258507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287574 + ... + 291343.

It is an arithmetic number, because the mean of its divisors is an integer number (91179585).

Almost surely, 2^1091258545 is an apocalyptic number.

It is an amenable number.

1091258545 is a deficient number, since it is larger than the sum of its proper divisors (367614815).

1091258545 is a wasteful number, since it uses less digits than its factorization.

1091258545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578964.

The product of its (nonzero) digits is 72000, while the sum is 40.

The square root of 1091258545 is about 33034.2026542189. The cubic root of 1091258545 is about 1029.5384066097.

The spelling of 1091258545 in words is "one billion, ninety-one million, two hundred fifty-eight thousand, five hundred forty-five".