1981053 has 12 divisors (see below), whose sum is σ = 2928640. Its totient is φ = 1289736.

The previous prime is 1981037. The next prime is 1981081. The reversal of 1981053 is 3501891.

It is not a de Polignac number, because 1981053 - 2⁴ = 1981037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981093) 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, 2173 + ... + 2946.

2^1981053 is an apocalyptic number.

It is an amenable number.

1981053 is a deficient number, since it is larger than the sum of its proper divisors (947587).

1981053 is a wasteful number, since it uses less digits than its factorization.

1981053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1981053 is about 1407.4988454702. The cubic root of 1981053 is about 125.5929798840.

The spelling of 1981053 in words is "one million, nine hundred eighty-one thousand, fifty-three".