1020023042 has 4 divisors (see below), whose sum is σ = 1530034566. Its totient is φ = 510011520.

The previous prime is 1020023041. The next prime is 1020023047. The reversal of 1020023042 is 2403200201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2403200201 = 277 ⋅8675813.

It can be written as a sum of positive squares in only one way, i.e., 1019588761 + 434281 = 31931^2 + 659^2 .

It is not an unprimeable number, because it can be changed into a prime (1020023041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255005759 + ... + 255005762.

Almost surely, 2^1020023042 is an apocalyptic number.

1020023042 is a deficient number, since it is larger than the sum of its proper divisors (510011524).

1020023042 is an equidigital number, since it uses as much as digits as its factorization.

1020023042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510011523.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1020023042 is about 31937.7995798082. The cubic root of 1020023042 is about 1006.6302894378.

Adding to 1020023042 its reverse (2403200201), we get a palindrome (3423223243).

The spelling of 1020023042 in words is "one billion, twenty million, twenty-three thousand, forty-two".