1042706221 has 4 divisors (see below), whose sum is σ = 1045195200. Its totient is φ = 1040217244.

The previous prime is 1042706209. The next prime is 1042706243. The reversal of 1042706221 is 1226072401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1226072401 = 29179 ⋅42019.

It is a cyclic number.

It is not a de Polignac number, because 1042706221 - 2⁹ = 1042705709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042706201) 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, 1243861 + ... + 1244698.

It is an arithmetic number, because the mean of its divisors is an integer number (261298800).

Almost surely, 2^1042706221 is an apocalyptic number.

It is an amenable number.

1042706221 is a deficient number, since it is larger than the sum of its proper divisors (2488979).

1042706221 is an equidigital number, since it uses as much as digits as its factorization.

1042706221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488978.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1042706221 is about 32290.9619088686. The cubic root of 1042706221 is about 1014.0374353842.

Adding to 1042706221 its reverse (1226072401), we get a palindrome (2268778622).

The spelling of 1042706221 in words is "one billion, forty-two million, seven hundred six thousand, two hundred twenty-one".