1094001821 has 8 divisors (see below), whose sum is σ = 1196900064. Its totient is φ = 991677520.

The previous prime is 1094001787. The next prime is 1094001827. The reversal of 1094001821 is 1281004901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1094001821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1094001827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139490 + ... + 147123.

It is an arithmetic number, because the mean of its divisors is an integer number (149612508).

Almost surely, 2^1094001821 is an apocalyptic number.

1094001821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1094001821 is a deficient number, since it is larger than the sum of its proper divisors (102898243).

1094001821 is a wasteful number, since it uses less digits than its factorization.

1094001821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286971.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1094001821 is about 33075.6983448574. The cubic root of 1094001821 is about 1030.4003913557.

The spelling of 1094001821 in words is "one billion, ninety-four million, one thousand, eight hundred twenty-one".