1111427521 has 2 divisors, whose sum is σ = 1111427522. Its totient is φ = 1111427520.

The previous prime is 1111427509. The next prime is 1111427567. The reversal of 1111427521 is 1257241111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086427521 + 25000000 = 32961^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111427521 - 2⁷ = 1111427393 is a prime.

It is a super-2 number, since 2×1111427521² = 2470542268872410882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111427501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555713760 + 555713761.

It is an arithmetic number, because the mean of its divisors is an integer number (555713761).

Almost surely, 2^1111427521 is an apocalyptic number.

It is an amenable number.

1111427521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111427521 is an equidigital number, since it uses as much as digits as its factorization.

1111427521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 1111427521 is about 33338.0791438259. The cubic root of 1111427521 is about 1035.8424752295.

Adding to 1111427521 its reverse (1257241111), we get a palindrome (2368668632).

The spelling of 1111427521 in words is "one billion, one hundred eleven million, four hundred twenty-seven thousand, five hundred twenty-one".