1043042639 has 4 divisors (see below), whose sum is σ = 1097939640. Its totient is φ = 988145640.

The previous prime is 1043042621. The next prime is 1043042641. The reversal of 1043042639 is 9362403401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1043042639 - 2²⁴ = 1026265423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043042339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27448472 + ... + 27448509.

It is an arithmetic number, because the mean of its divisors is an integer number (274484910).

Almost surely, 2^1043042639 is an apocalyptic number.

1043042639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1043042639 is a deficient number, since it is larger than the sum of its proper divisors (54897001).

1043042639 is an equidigital number, since it uses as much as digits as its factorization.

1043042639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54897000.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1043042639 is about 32296.1706553579. The cubic root of 1043042639 is about 1014.1464797654.

The spelling of 1043042639 in words is "one billion, forty-three million, forty-two thousand, six hundred thirty-nine".