1020215243 has 4 divisors (see below), whose sum is σ = 1033129440. Its totient is φ = 1007301048.

The previous prime is 1020215233. The next prime is 1020215249. The reversal of 1020215243 is 3425120201.

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 1020215243 - 2⁴ = 1020215227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020215249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6456980 + ... + 6457137.

It is an arithmetic number, because the mean of its divisors is an integer number (258282360).

Almost surely, 2^1020215243 is an apocalyptic number.

1020215243 is a deficient number, since it is larger than the sum of its proper divisors (12914197).

1020215243 is an equidigital number, since it uses as much as digits as its factorization.

1020215243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12914196.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1020215243 is about 31940.8084274647. The cubic root of 1020215243 is about 1006.6935112768.

Adding to 1020215243 its reverse (3425120201), we get a palindrome (4445335444).

The spelling of 1020215243 in words is "one billion, twenty million, two hundred fifteen thousand, two hundred forty-three".