1968481 has 4 divisors (see below), whose sum is σ = 2084292. Its totient is φ = 1852672.

The previous prime is 1968467. The next prime is 1968487. The reversal of 1968481 is 1848691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 1392400 = 759^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968481 - 2⁷ = 1968353 is a prime.

It is a super-2 number, since 2×1968481² = 7749834894722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1968481.

It is not an unprimeable number, because it can be changed into a prime (1968487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57880 + ... + 57913.

It is an arithmetic number, because the mean of its divisors is an integer number (521073).

2^1968481 is an apocalyptic number.

It is an amenable number.

1968481 is a deficient number, since it is larger than the sum of its proper divisors (115811).

1968481 is a wasteful number, since it uses less digits than its factorization.

1968481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115810.

The product of its digits is 13824, while the sum is 37.

The square root of 1968481 is about 1403.0256590669. The cubic root of 1968481 is about 125.3267398511.

The spelling of 1968481 in words is "one million, nine hundred sixty-eight thousand, four hundred eighty-one".