1039985281 has 2 divisors, whose sum is σ = 1039985282. Its totient is φ = 1039985280.

The previous prime is 1039985257. The next prime is 1039985299. The reversal of 1039985281 is 1825899301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665175681 + 374809600 = 25791^2 + 19360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039985281 - 2⁹ = 1039984769 is a prime.

It is a super-2 number, since 2×1039985281² = 2163138769393297922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1039985201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519992640 + 519992641.

It is an arithmetic number, because the mean of its divisors is an integer number (519992641).

Almost surely, 2^1039985281 is an apocalyptic number.

It is an amenable number.

1039985281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039985281 is an equidigital number, since it uses as much as digits as its factorization.

1039985281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 1039985281 is about 32248.8027839794. The cubic root of 1039985281 is about 1013.1546240882.

The spelling of 1039985281 in words is "one billion, thirty-nine million, nine hundred eighty-five thousand, two hundred eighty-one".