1961842 has 4 divisors (see below), whose sum is σ = 2942766. Its totient is φ = 980920.

The previous prime is 1961833. The next prime is 1961857. The reversal of 1961842 is 2481691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2481691 = 181 ⋅13711.

It can be written as a sum of positive squares in only one way, i.e., 1792921 + 168921 = 1339^2 + 411^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490459 + ... + 490462.

2^1961842 is an apocalyptic number.

1961842 is a deficient number, since it is larger than the sum of its proper divisors (980924).

1961842 is an equidigital number, since it uses as much as digits as its factorization.

1961842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980923.

The product of its digits is 3456, while the sum is 31.

The square root of 1961842 is about 1400.6577026526. The cubic root of 1961842 is about 125.1856866937.

The spelling of 1961842 in words is "one million, nine hundred sixty-one thousand, eight hundred forty-two".