1157474221 has 2 divisors, whose sum is σ = 1157474222. Its totient is φ = 1157474220.

The previous prime is 1157474209. The next prime is 1157474237. The reversal of 1157474221 is 1224747511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1135016100 + 22458121 = 33690^2 + 4739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157474221 - 2¹⁷ = 1157343149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157474251) 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, 578737110 + 578737111.

It is an arithmetic number, because the mean of its divisors is an integer number (578737111).

Almost surely, 2^1157474221 is an apocalyptic number.

It is an amenable number.

1157474221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157474221 is an equidigital number, since it uses as much as digits as its factorization.

1157474221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 34.

The square root of 1157474221 is about 34021.6728130761. The cubic root of 1157474221 is about 1049.9544110214.

The spelling of 1157474221 in words is "one billion, one hundred fifty-seven million, four hundred seventy-four thousand, two hundred twenty-one".