994481281 has 6 divisors (see below), whose sum is σ = 1019330246. Its totient is φ = 970224000.

The previous prime is 994481273. The next prime is 994481287. The reversal of 994481281 is 182184499.

It can be written as a sum of positive squares in 3 ways, for example, as 190191681 + 804289600 = 13791^2 + 28360^2 .

It is not a de Polignac number, because 994481281 - 2³ = 994481273 is a prime.

It is a super-2 number, since 2×994481281² = 1977986036518801922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994481287) 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 5 ways as a sum of consecutive naturals, for example, 294120 + ... + 297481.

Almost surely, 2^994481281 is an apocalyptic number.

It is an amenable number.

994481281 is a deficient number, since it is larger than the sum of its proper divisors (24848965).

994481281 is an equidigital number, since it uses as much as digits as its factorization.

994481281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591683 (or 591642 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 994481281 is about 31535.3972703691. The cubic root of 994481281 is about 998.1570325576.

The spelling of 994481281 in words is "nine hundred ninety-four million, four hundred eighty-one thousand, two hundred eighty-one".