1094881921 has 27 divisors (see below), whose sum is σ = 1327213251. Its totient is φ = 900550224.

The previous prime is 1094881877. The next prime is 1094881951. The reversal of 1094881921 is 1291884901.

It is a happy number.

The square root of 1094881921 is 33089.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 574129521 + 520752400 = 23961^2 + 22820^2 .

It is not a de Polignac number, because 1094881921 - 2¹¹ = 1094879873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1094881951) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6716986 + ... + 6717148.

Almost surely, 2^1094881921 is an apocalyptic number.

1094881921 is the 33089-th square number.

1094881921 is the 16545-th centered octagonal number.

It is an amenable number.

1094881921 is a deficient number, since it is larger than the sum of its proper divisors (232331330).

1094881921 is an frugal number, since it uses more digits than its factorization.

1094881921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The cubic root of 1094881921 is about 1030.6766286508.

The spelling of 1094881921 in words is "one billion, ninety-four million, eight hundred eighty-one thousand, nine hundred twenty-one".