1961443 has 12 divisors (see below), whose sum is σ = 2276712. Its totient is φ = 1675520.

The previous prime is 1961441. The next prime is 1961447. The reversal of 1961443 is 3441691.

It is not a de Polignac number, because 1961443 - 2¹ = 1961441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2871 + ... + 3487.

It is an arithmetic number, because the mean of its divisors is an integer number (189726).

2^1961443 is an apocalyptic number.

1961443 is a deficient number, since it is larger than the sum of its proper divisors (315269).

1961443 is a wasteful number, since it uses less digits than its factorization.

1961443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 645 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1961443 is about 1400.5152623231. The cubic root of 1961443 is about 125.1771993511.

The spelling of 1961443 in words is "one million, nine hundred sixty-one thousand, four hundred forty-three".