1020042305 has 8 divisors (see below), whose sum is σ = 1244117544. Its totient is φ = 802656000.

The previous prime is 1020042277. The next prime is 1020042311. The reversal of 1020042305 is 5032400201.

It can be written as a sum of positive squares in 4 ways, for example, as 83192641 + 936849664 = 9121^2 + 30608^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020042305 - 2¹² = 1020038209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671896 + ... + 1672505.

It is an arithmetic number, because the mean of its divisors is an integer number (155514693).

Almost surely, 2^1020042305 is an apocalyptic number.

It is an amenable number.

1020042305 is a deficient number, since it is larger than the sum of its proper divisors (224075239).

1020042305 is an equidigital number, since it uses as much as digits as its factorization.

1020042305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344467.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1020042305 is about 31938.1011489412. The cubic root of 1020042305 is about 1006.6366260912.

Adding to 1020042305 its reverse (5032400201), we get a palindrome (6052442506).

The spelling of 1020042305 in words is "one billion, twenty million, forty-two thousand, three hundred five".