1042328781 has 12 divisors (see below), whose sum is σ = 1621400508. Its totient is φ = 641433024.

The previous prime is 1042328761. The next prime is 1042328783. The reversal of 1042328781 is 1878232401.

1042328781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 563112900 + 479215881 = 23730^2 + 21891^2 .

It is not a de Polignac number, because 1042328781 - 2⁷ = 1042328653 is a prime.

It is a super-2 number, since 2×1042328781² = 2172898575401891922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042328783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4454280 + ... + 4454513.

It is an arithmetic number, because the mean of its divisors is an integer number (135116709).

Almost surely, 2^1042328781 is an apocalyptic number.

It is an amenable number.

1042328781 is a deficient number, since it is larger than the sum of its proper divisors (579071727).

1042328781 is a wasteful number, since it uses less digits than its factorization.

1042328781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8908812 (or 8908809 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1042328781 is about 32285.1170200760. The cubic root of 1042328781 is about 1013.9150664713.

It can be divided in two parts, 10423 and 28781, that added together give a square (39204 = 198²).

The spelling of 1042328781 in words is "one billion, forty-two million, three hundred twenty-eight thousand, seven hundred eighty-one".