1125345553 has 2 divisors, whose sum is σ = 1125345554. Its totient is φ = 1125345552.

The previous prime is 1125345523. The next prime is 1125345563. The reversal of 1125345553 is 3555435211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028677329 + 96668224 = 32073^2 + 9832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125345553 - 2²⁵ = 1091791121 is a prime.

It is a super-2 number, since 2×1125345553² = 2532805227313751618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1125345503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562672776 + 562672777.

It is an arithmetic number, because the mean of its divisors is an integer number (562672777).

Almost surely, 2^1125345553 is an apocalyptic number.

It is an amenable number.

1125345553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125345553 is an equidigital number, since it uses as much as digits as its factorization.

1125345553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 34.

The square root of 1125345553 is about 33546.1704669848. The cubic root of 1125345553 is about 1040.1483864333.

The spelling of 1125345553 in words is "one billion, one hundred twenty-five million, three hundred forty-five thousand, five hundred fifty-three".