1648421 has 8 divisors (see below), whose sum is σ = 1754400. Its totient is φ = 1544400.

The previous prime is 1648417. The next prime is 1648429. The reversal of 1648421 is 1248461.

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

It is a cyclic number.

It is not a de Polignac number, because 1648421 - 2² = 1648417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648429) 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, 1490 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (219300).

2^1648421 is an apocalyptic number.

It is an amenable number.

1648421 is a deficient number, since it is larger than the sum of its proper divisors (105979).

1648421 is a wasteful number, since it uses less digits than its factorization.

1648421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its digits is 1536, while the sum is 26.

The square root of 1648421 is about 1283.9084858353. The cubic root of 1648421 is about 118.1288690725.

The spelling of 1648421 in words is "one million, six hundred forty-eight thousand, four hundred twenty-one".