1092921985 has 16 divisors (see below), whose sum is σ = 1357722000. Its totient is φ = 843571456.

The previous prime is 1092921943. The next prime is 1092921997. The reversal of 1092921985 is 5891292901.

It can be written as a sum of positive squares in 8 ways, for example, as 685584 + 1092236401 = 828^2 + 33049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1092921985 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368127 + ... + 371083.

It is an arithmetic number, because the mean of its divisors is an integer number (84857625).

Almost surely, 2^1092921985 is an apocalyptic number.

It is an amenable number.

1092921985 is a deficient number, since it is larger than the sum of its proper divisors (264800015).

1092921985 is a wasteful number, since it uses less digits than its factorization.

1092921985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 1092921985 is about 33059.3706080439. The cubic root of 1092921985 is about 1030.0612603775.

The spelling of 1092921985 in words is "one billion, ninety-two million, nine hundred twenty-one thousand, nine hundred eighty-five".