1994421 has 16 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 1115520.

The previous prime is 1994413. The next prime is 1994429. The reversal of 1994421 is 1244991.

It is an interprime number because it is at equal distance from previous prime (1994413) and next prime (1994429).

It is not a de Polignac number, because 1994421 - 2³ = 1994413 is a prime.

It is a super-3 number, since 3×1994421³ = 23799715733394841383, which contains 333 as substring.

1994421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896 + ... + 2753.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^1994421 is an apocalyptic number.

1994421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1994421 is a deficient number, since it is larger than the sum of its proper divisors (1130379).

1994421 is a wasteful number, since it uses less digits than its factorization.

1994421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676.

The product of its digits is 2592, while the sum is 30.

The square root of 1994421 is about 1412.2397105308. The cubic root of 1994421 is about 125.8748442299.

It can be divided in two parts, 1994 and 421, that added together give a triangular number (2415 = T₆₉).

The spelling of 1994421 in words is "one million, nine hundred ninety-four thousand, four hundred twenty-one".