1039539921 has 32 divisors (see below), whose sum is σ = 1624043520. Its totient is φ = 579083904.

The previous prime is 1039539911. The next prime is 1039539931. The reversal of 1039539921 is 1299359301.

It is an interprime number because it is at equal distance from previous prime (1039539911) and next prime (1039539931).

It is not a de Polignac number, because 1039539921 - 2¹⁰ = 1039538897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1039539911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729816 + ... + 731238.

It is an arithmetic number, because the mean of its divisors is an integer number (50751360).

Almost surely, 2^1039539921 is an apocalyptic number.

It is an amenable number.

1039539921 is a deficient number, since it is larger than the sum of its proper divisors (584503599).

1039539921 is a wasteful number, since it uses less digits than its factorization.

1039539921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 1039539921 is about 32241.8969820326. The cubic root of 1039539921 is about 1013.0099800641.

The spelling of 1039539921 in words is "one billion, thirty-nine million, five hundred thirty-nine thousand, nine hundred twenty-one".