1642226 has 4 divisors (see below), whose sum is σ = 2463342. Its totient is φ = 821112.

The previous prime is 1642211. The next prime is 1642231. The reversal of 1642226 is 6222461.

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., 1221025 + 421201 = 1105^2 + 649^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

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, 410555 + ... + 410558.

2^1642226 is an apocalyptic number.

1642226 is a deficient number, since it is larger than the sum of its proper divisors (821116).

1642226 is an equidigital number, since it uses as much as digits as its factorization.

1642226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821115.

The product of its digits is 1152, while the sum is 23.

The square root of 1642226 is about 1281.4936597580. The cubic root of 1642226 is about 117.9807016223.

Adding to 1642226 its reverse (6222461), we get a palindrome (7864687).

The spelling of 1642226 in words is "one million, six hundred forty-two thousand, two hundred twenty-six".