1125576521 has 2 divisors, whose sum is σ = 1125576522. Its totient is φ = 1125576520.

The previous prime is 1125576509. The next prime is 1125576527. The reversal of 1125576521 is 1256755211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817960000 + 307616521 = 28600^2 + 17539^2 .

It is an emirp because it is prime and its reverse (1256755211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125576521 - 2²² = 1121382217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125576527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562788260 + 562788261.

It is an arithmetic number, because the mean of its divisors is an integer number (562788261).

Almost surely, 2^1125576521 is an apocalyptic number.

It is an amenable number.

1125576521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125576521 is an equidigital number, since it uses as much as digits as its factorization.

1125576521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 35.

The square root of 1125576521 is about 33549.6128293606. The cubic root of 1125576521 is about 1040.2195422242.

The spelling of 1125576521 in words is "one billion, one hundred twenty-five million, five hundred seventy-six thousand, five hundred twenty-one".