1125857591 has 2 divisors, whose sum is σ = 1125857592. Its totient is φ = 1125857590.

The previous prime is 1125857573. The next prime is 1125857639. The reversal of 1125857591 is 1957585211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125857591 - 2¹⁴ = 1125841207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125853591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562928795 + 562928796.

It is an arithmetic number, because the mean of its divisors is an integer number (562928796).

Almost surely, 2^1125857591 is an apocalyptic number.

1125857591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125857591 is an equidigital number, since it uses as much as digits as its factorization.

1125857591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 44.

The square root of 1125857591 is about 33553.8014388832. The cubic root of 1125857591 is about 1040.3061201299.

The spelling of 1125857591 in words is "one billion, one hundred twenty-five million, eight hundred fifty-seven thousand, five hundred ninety-one".