1045940281 has 3 divisors (see below), whose sum is σ = 1045972623. Its totient is φ = 1045907940.

The previous prime is 1045940261. The next prime is 1045940297. The reversal of 1045940281 is 1820495401.

It is a happy number.

The square root of 1045940281 is 32341.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 105904681 + 940035600 = 10291^2 + 30660^2 .

It is not a de Polignac number, because 1045940281 - 2⁷ = 1045940153 is a prime.

It is a super-2 number, since 2×1045940281² = 2187982142836717922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045940261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16171 + ... + 48511.

It is an arithmetic number, because the mean of its divisors is an integer number (348657541).

Almost surely, 2^1045940281 is an apocalyptic number.

1045940281 is the 32341-st square number.

1045940281 is the 16171-st centered octagonal number.

It is an amenable number.

1045940281 is a deficient number, since it is larger than the sum of its proper divisors (32342).

1045940281 is an frugal number, since it uses more digits than its factorization.

1045940281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64682 (or 32341 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The cubic root of 1045940281 is about 1015.0847336381.

The spelling of 1045940281 in words is "one billion, forty-five million, nine hundred forty thousand, two hundred eighty-one".