1408421 has 4 divisors (see below), whose sum is σ = 1609632. Its totient is φ = 1207212.

The previous prime is 1408417. The next prime is 1408453. The reversal of 1408421 is 1248041.

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.

It is a cyclic number.

It is not a de Polignac number, because 1408421 - 2² = 1408417 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1408393 and 1408402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408411) 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 3 ways as a sum of consecutive naturals, for example, 100595 + ... + 100608.

It is an arithmetic number, because the mean of its divisors is an integer number (402408).

2^1408421 is an apocalyptic number.

It is an amenable number.

1408421 is a deficient number, since it is larger than the sum of its proper divisors (201211).

1408421 is an equidigital number, since it uses as much as digits as its factorization.

1408421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201210.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1408421 is about 1186.7691435153. The cubic root of 1408421 is about 112.0927431221.

The spelling of 1408421 in words is "one million, four hundred eight thousand, four hundred twenty-one".