1039681 has 2 divisors, whose sum is σ = 1039682. Its totient is φ = 1039680.

The previous prime is 1039667. The next prime is 1039733. The reversal of 1039681 is 1869301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 57600 = 991^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039681 - 2⁷ = 1039553 is a prime.

It is a super-4 number, since 4×1039681⁴ (a number of 25 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1039631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519840 + 519841.

It is an arithmetic number, because the mean of its divisors is an integer number (519841).

2^1039681 is an apocalyptic number.

It is an amenable number.

1039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039681 is an equidigital number, since it uses as much as digits as its factorization.

1039681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1039681 is about 1019.6474881056. The cubic root of 1039681 is about 101.3055804173.

The spelling of 1039681 in words is "one million, thirty-nine thousand, six hundred eighty-one".