1056221242 has 4 divisors (see below), whose sum is σ = 1584331866. Its totient is φ = 528110620.

The previous prime is 1056221233. The next prime is 1056221261. The reversal of 1056221242 is 2421226501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2421226501 = 29 ⋅83490569.

It can be written as a sum of positive squares in only one way, i.e., 1054235961 + 1985281 = 32469^2 + 1409^2 .

It is a super-2 number, since 2×1056221242² = 2231206624104045128, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 264055309 + ... + 264055312.

Almost surely, 2^1056221242 is an apocalyptic number.

1056221242 is a deficient number, since it is larger than the sum of its proper divisors (528110624).

1056221242 is an equidigital number, since it uses as much as digits as its factorization.

1056221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528110623.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1056221242 is about 32499.5575662193. The cubic root of 1056221242 is about 1018.3997854661.

Adding to 1056221242 its reverse (2421226501), we get a palindrome (3477447743).

The spelling of 1056221242 in words is "one billion, fifty-six million, two hundred twenty-one thousand, two hundred forty-two".