1111465721 has 2 divisors, whose sum is σ = 1111465722. Its totient is φ = 1111465720.

The previous prime is 1111465631. The next prime is 1111465727. The reversal of 1111465721 is 1275641111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664608400 + 446857321 = 25780^2 + 21139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111465721 - 2³⁰ = 37723897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111465727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555732860 + 555732861.

It is an arithmetic number, because the mean of its divisors is an integer number (555732861).

Almost surely, 2^1111465721 is an apocalyptic number.

It is an amenable number.

1111465721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111465721 is an equidigital number, since it uses as much as digits as its factorization.

1111465721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 1111465721 is about 33338.6520573343. The cubic root of 1111465721 is about 1035.8543424689.

The spelling of 1111465721 in words is "one billion, one hundred eleven million, four hundred sixty-five thousand, seven hundred twenty-one".