1938481 has 4 divisors (see below), whose sum is σ = 1944052. Its totient is φ = 1932912.

The previous prime is 1938451. The next prime is 1938491. The reversal of 1938481 is 1848391.

1938481 = 984² + 985².

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: 1848391 = 151 ⋅12241.

It can be written as a sum of positive squares in 2 ways, for example, as 970225 + 968256 = 985^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1938481 - 2⁵ = 1938449 is a prime.

It is a super-2 number, since 2×1938481² = 7515417174722, which contains 22 as substring.

It is a Duffinian number.

1938481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1938451) 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, 2226 + ... + 2971.

It is an arithmetic number, because the mean of its divisors is an integer number (486013).

2^1938481 is an apocalyptic number.

1938481 is the 985-th centered square number.

It is an amenable number.

1938481 is a deficient number, since it is larger than the sum of its proper divisors (5571).

1938481 is an equidigital number, since it uses as much as digits as its factorization.

1938481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570.

The product of its digits is 6912, while the sum is 34.

The square root of 1938481 is about 1392.2934317162. The cubic root of 1938481 is about 124.6868106213.

The spelling of 1938481 in words is "one million, nine hundred thirty-eight thousand, four hundred eighty-one".