1042300021 has 6 divisors (see below), whose sum is σ = 1212471510. Its totient is φ = 893399976.

The previous prime is 1042300019. The next prime is 1042300031. The reversal of 1042300021 is 1200032401.

1042300021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1037741796 + 4558225 = 32214^2 + 2135^2 .

It is not a de Polignac number, because 1042300021 - 2¹ = 1042300019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042299974 and 1042300010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042300031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10635666 + ... + 10635763.

It is an arithmetic number, because the mean of its divisors is an integer number (202078585).

Almost surely, 2^1042300021 is an apocalyptic number.

It is an amenable number.

1042300021 is a deficient number, since it is larger than the sum of its proper divisors (170171489).

1042300021 is an equidigital number, since it uses as much as digits as its factorization.

1042300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21271443 (or 21271436 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1042300021 is about 32284.6716105337. The cubic root of 1042300021 is about 1013.9057410498.

Adding to 1042300021 its reverse (1200032401), we get a palindrome (2242332422).

The spelling of 1042300021 in words is "one billion, forty-two million, three hundred thousand, twenty-one".