1042254221 has 4 divisors (see below), whose sum is σ = 1070423292. Its totient is φ = 1014085152.

The previous prime is 1042254197. The next prime is 1042254247. The reversal of 1042254221 is 1224522401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 492351721 + 549902500 = 22189^2 + 23450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042254221 is a prime.

It is a super-2 number, since 2×1042254221² = 2172587722384633682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042257221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14084480 + ... + 14084553.

It is an arithmetic number, because the mean of its divisors is an integer number (267605823).

Almost surely, 2^1042254221 is an apocalyptic number.

It is an amenable number.

1042254221 is a deficient number, since it is larger than the sum of its proper divisors (28169071).

1042254221 is an equidigital number, since it uses as much as digits as its factorization.

1042254221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28169070.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1042254221 is about 32283.9622877986. The cubic root of 1042254221 is about 1013.8908900593.

Adding to 1042254221 its reverse (1224522401), we get a palindrome (2266776622).

The spelling of 1042254221 in words is "one billion, forty-two million, two hundred fifty-four thousand, two hundred twenty-one".