1020244139 has 2 divisors, whose sum is σ = 1020244140. Its totient is φ = 1020244138.

The previous prime is 1020244129. The next prime is 1020244151. The reversal of 1020244139 is 9314420201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020244139 - 2¹⁶ = 1020178603 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020244129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510122069 + 510122070.

It is an arithmetic number, because the mean of its divisors is an integer number (510122070).

Almost surely, 2^1020244139 is an apocalyptic number.

1020244139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020244139 is an equidigital number, since it uses as much as digits as its factorization.

1020244139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1020244139 is about 31941.2607609656. The cubic root of 1020244139 is about 1006.7030155264.

The spelling of 1020244139 in words is "one billion, twenty million, two hundred forty-four thousand, one hundred thirty-nine".