1616842 has 4 divisors (see below), whose sum is σ = 2425266. Its totient is φ = 808420.

The previous prime is 1616833. The next prime is 1616851. The reversal of 1616842 is 2486161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2486161 = 73 ⋅34057.

It is an interprime number because it is at equal distance from previous prime (1616833) and next prime (1616851).

It can be written as a sum of positive squares in only one way, i.e., 962361 + 654481 = 981^2 + 809^2 .

It is a super-2 number, since 2×1616842² = 5228356105928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1616842.

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, 404209 + ... + 404212.

2^1616842 is an apocalyptic number.

1616842 is a deficient number, since it is larger than the sum of its proper divisors (808424).

1616842 is an equidigital number, since it uses as much as digits as its factorization.

1616842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808423.

The product of its digits is 2304, while the sum is 28.

The square root of 1616842 is about 1271.5510213908. The cubic root of 1616842 is about 117.3696638386.

The spelling of 1616842 in words is "one million, six hundred sixteen thousand, eight hundred forty-two".