1053981 has 6 divisors (see below), whose sum is σ = 1522430. Its totient is φ = 702648.

The previous prime is 1053971. The next prime is 1053989. The reversal of 1053981 is 1893501.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 260100 = 891^2 + 510^2 .

It is not a de Polignac number, because 1053981 - 2¹⁹ = 529693 is a prime.

It is a super-2 number, since 2×1053981² = 2221751896722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58546 + ... + 58563.

2^1053981 is an apocalyptic number.

It is an amenable number.

1053981 is a deficient number, since it is larger than the sum of its proper divisors (468449).

1053981 is a wasteful number, since it uses less digits than its factorization.

1053981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117115 (or 117112 counting only the distinct ones).

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

The square root of 1053981 is about 1026.6357679333. The cubic root of 1053981 is about 101.7679268218.

The spelling of 1053981 in words is "one million, fifty-three thousand, nine hundred eighty-one".