1421626 has 4 divisors (see below), whose sum is σ = 2132442. Its totient is φ = 710812.

The previous prime is 1421621. The next prime is 1421627. The reversal of 1421626 is 6261241.

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

It can be written as a sum of positive squares in only one way, i.e., 783225 + 638401 = 885^2 + 799^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1421597 and 1421606.

It is not an unprimeable number, because it can be changed into a prime (1421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355405 + ... + 355408.

2^1421626 is an apocalyptic number.

1421626 is a deficient number, since it is larger than the sum of its proper divisors (710816).

1421626 is an equidigital number, since it uses as much as digits as its factorization.

1421626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710815.

The product of its digits is 576, while the sum is 22.

The square root of 1421626 is about 1192.3195880300. The cubic root of 1421626 is about 112.4419717198.

Adding to 1421626 its reverse (6261241), we get a palindrome (7682867).

The spelling of 1421626 in words is "one million, four hundred twenty-one thousand, six hundred twenty-six".