1426421 has 4 divisors (see below), whose sum is σ = 1430412. Its totient is φ = 1422432.

The previous prime is 1426393. The next prime is 1426427. The reversal of 1426421 is 1246241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 703921 + 722500 = 839^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1426421 - 2¹⁴ = 1410037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1426393 and 1426402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426427) 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, 1400 + ... + 2193.

It is an arithmetic number, because the mean of its divisors is an integer number (357603).

2^1426421 is an apocalyptic number.

It is an amenable number.

1426421 is a deficient number, since it is larger than the sum of its proper divisors (3991).

1426421 is an equidigital number, since it uses as much as digits as its factorization.

1426421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990.

The product of its digits is 384, while the sum is 20.

The square root of 1426421 is about 1194.3286817288. The cubic root of 1426421 is about 112.5682483006.

The spelling of 1426421 in words is "one million, four hundred twenty-six thousand, four hundred twenty-one".