994421 has 4 divisors (see below), whose sum is σ = 1002144. Its totient is φ = 986700.

The previous prime is 994417. The next prime is 994447. The reversal of 994421 is 124499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124499 = 23 ⋅5413.

It is a cyclic number.

It is not a de Polignac number, because 994421 - 2² = 994417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3665 + ... + 3926.

It is an arithmetic number, because the mean of its divisors is an integer number (250536).

2⁹⁹⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

994421 is a deficient number, since it is larger than the sum of its proper divisors (7723).

994421 is a wasteful number, since it uses less digits than its factorization.

994421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7722.

The product of its digits is 2592, while the sum is 29.

The square root of 994421 is about 997.2065984539. The cubic root of 994421 is about 99.8136864214.

The spelling of 994421 in words is "nine hundred ninety-four thousand, four hundred twenty-one".