1125309551 has 2 divisors, whose sum is σ = 1125309552. Its totient is φ = 1125309550.

The previous prime is 1125309541. The next prime is 1125309587. The reversal of 1125309551 is 1559035211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1559035211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125309551 - 2³⁰ = 51567727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125309511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562654775 + 562654776.

It is an arithmetic number, because the mean of its divisors is an integer number (562654776).

Almost surely, 2^1125309551 is an apocalyptic number.

1125309551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125309551 is an equidigital number, since it uses as much as digits as its factorization.

1125309551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 1125309551 is about 33545.6338589689. The cubic root of 1125309551 is about 1040.1372941896.

The spelling of 1125309551 in words is "one billion, one hundred twenty-five million, three hundred nine thousand, five hundred fifty-one".