1020242749 has 2 divisors, whose sum is σ = 1020242750. Its totient is φ = 1020242748.

The previous prime is 1020242747. The next prime is 1020242789. The reversal of 1020242749 is 9472420201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968143225 + 52099524 = 31115^2 + 7218^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020242749 - 2¹ = 1020242747 is a prime.

Together with 1020242747, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1020242749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020242747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510121374 + 510121375.

It is an arithmetic number, because the mean of its divisors is an integer number (510121375).

Almost surely, 2^1020242749 is an apocalyptic number.

It is an amenable number.

1020242749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020242749 is an equidigital number, since it uses as much as digits as its factorization.

1020242749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1020242749 is about 31941.2390022679. The cubic root of 1020242749 is about 1006.7025583424.

The spelling of 1020242749 in words is "one billion, twenty million, two hundred forty-two thousand, seven hundred forty-nine".