1094402821 has 2 divisors, whose sum is σ = 1094402822. Its totient is φ = 1094402820.

The previous prime is 1094402809. The next prime is 1094402861. The reversal of 1094402821 is 1282044901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744525796 + 349877025 = 27286^2 + 18705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1094402821 - 2⁵ = 1094402789 is a prime.

It is a super-2 number, since 2×1094402821² = 2395435069225516082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1094402801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547201410 + 547201411.

It is an arithmetic number, because the mean of its divisors is an integer number (547201411).

Almost surely, 2^1094402821 is an apocalyptic number.

It is an amenable number.

1094402821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1094402821 is an equidigital number, since it uses as much as digits as its factorization.

1094402821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1094402821 is about 33081.7596418328. The cubic root of 1094402821 is about 1030.5262717321.

The spelling of 1094402821 in words is "one billion, ninety-four million, four hundred two thousand, eight hundred twenty-one".