1020123243 has 48 divisors (see below), whose sum is σ = 1595842560. Its totient is φ = 625968000.

The previous prime is 1020123217. The next prime is 1020123257. The reversal of 1020123243 is 3423210201.

It is not a de Polignac number, because 1020123243 - 2¹⁰ = 1020122219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020123943) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 885718 + ... + 886868.

It is an arithmetic number, because the mean of its divisors is an integer number (33246720).

Almost surely, 2^1020123243 is an apocalyptic number.

1020123243 is a deficient number, since it is larger than the sum of its proper divisors (575719317).

1020123243 is a wasteful number, since it uses less digits than its factorization.

1020123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1020123243 is about 31939.3682310718. The cubic root of 1020123243 is about 1006.6632501504.

Adding to 1020123243 its reverse (3423210201), we get a palindrome (4443333444).

The spelling of 1020123243 in words is "one billion, twenty million, one hundred twenty-three thousand, two hundred forty-three".