1943421 has 8 divisors (see below), whose sum is σ = 2674944. Its totient is φ = 1253760.

The previous prime is 1943419. The next prime is 1943429. The reversal of 1943421 is 1243491.

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

It is not a de Polignac number, because 1943421 - 2¹ = 1943419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1943391 and 1943400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1943429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10356 + ... + 10541.

It is an arithmetic number, because the mean of its divisors is an integer number (334368).

2^1943421 is an apocalyptic number.

It is an amenable number.

1943421 is a deficient number, since it is larger than the sum of its proper divisors (731523).

1943421 is a wasteful number, since it uses less digits than its factorization.

1943421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20931.

The product of its digits is 864, while the sum is 24.

The square root of 1943421 is about 1394.0663542314. The cubic root of 1943421 is about 124.7926375300.

The spelling of 1943421 in words is "one million, nine hundred forty-three thousand, four hundred twenty-one".