1078531281 has 45 divisors (see below), whose sum is σ = 1670157313. Its totient is φ = 693601920.

The previous prime is 1078531243. The next prime is 1078531283. The reversal of 1078531281 is 1821358701.

The square root of 1078531281 is 32841.

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

It can be written as a sum of positive squares in 4 ways, for example, as 657460881 + 421070400 = 25641^2 + 20520^2 .

It is not a de Polignac number, because 1078531281 - 2¹¹ = 1078529233 is a prime.

It is a super-2 number, since 2×1078531281² = 2326459448191001922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1078531283) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12118285 + ... + 12118373.

Almost surely, 2^1078531281 is an apocalyptic number.

1078531281 is the 32841-st square number.

1078531281 is the 16421-st centered octagonal number.

It is an amenable number.

1078531281 is a deficient number, since it is larger than the sum of its proper divisors (591626032).

1078531281 is an frugal number, since it uses more digits than its factorization.

1078531281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The cubic root of 1078531281 is about 1025.5202692106.

Multiplying 1078531281 by its sum of digits (36), we get a square (38827126116 = 197046²).

Adding to 1078531281 its reverse (1821358701), we get a palindrome (2899889982).

The spelling of 1078531281 in words is "one billion, seventy-eight million, five hundred thirty-one thousand, two hundred eighty-one".