1822642 has 4 divisors (see below), whose sum is σ = 2733966. Its totient is φ = 911320.

The previous prime is 1822637. The next prime is 1822649. The reversal of 1822642 is 2462281.

It is a happy number.

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., 1347921 + 474721 = 1161^2 + 689^2 .

It is not an unprimeable number, because it can be changed into a prime (1822649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455659 + ... + 455662.

2^1822642 is an apocalyptic number.

1822642 is a deficient number, since it is larger than the sum of its proper divisors (911324).

1822642 is an equidigital number, since it uses as much as digits as its factorization.

1822642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911323.

The product of its digits is 1536, while the sum is 25.

The square root of 1822642 is about 1350.0525915682. The cubic root of 1822642 is about 122.1519650702.

The spelling of 1822642 in words is "one million, eight hundred twenty-two thousand, six hundred forty-two".