1642418 has 4 divisors (see below), whose sum is σ = 2463630. Its totient is φ = 821208.

The previous prime is 1642397. The next prime is 1642423. The reversal of 1642418 is 8142461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8142461 = 859 ⋅9479.

It can be written as a sum of positive squares in only one way, i.e., 1495729 + 146689 = 1223^2 + 383^2 .

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, 410603 + ... + 410606.

2^1642418 is an apocalyptic number.

1642418 is a deficient number, since it is larger than the sum of its proper divisors (821212).

1642418 is an equidigital number, since it uses as much as digits as its factorization.

1642418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821211.

The product of its digits is 1536, while the sum is 26.

The square root of 1642418 is about 1281.5685701514. The cubic root of 1642418 is about 117.9852993273.

Adding to 1642418 its reverse (8142461), we get a palindrome (9784879).

The spelling of 1642418 in words is "one million, six hundred forty-two thousand, four hundred eighteen".