1943642 has 4 divisors (see below), whose sum is σ = 2915466. Its totient is φ = 971820.

The previous prime is 1943639. The next prime is 1943651. The reversal of 1943642 is 2463491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2463491 = 101 ⋅24391.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 36481 = 1381^2 + 191^2 .

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, 485909 + ... + 485912.

2^1943642 is an apocalyptic number.

1943642 is a deficient number, since it is larger than the sum of its proper divisors (971824).

1943642 is an equidigital number, since it uses as much as digits as its factorization.

1943642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971823.

The product of its digits is 5184, while the sum is 29.

The square root of 1943642 is about 1394.1456164978. The cubic root of 1943642 is about 124.7973676987.

The spelling of 1943642 in words is "one million, nine hundred forty-three thousand, six hundred forty-two".