1125686629 has 2 divisors, whose sum is σ = 1125686630. Its totient is φ = 1125686628.

The previous prime is 1125686623. The next prime is 1125686641. The reversal of 1125686629 is 9266865211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 702356004 + 423330625 = 26502^2 + 20575^2 .

It is an emirp because it is prime and its reverse (9266865211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125686629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125686623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562843314 + 562843315.

It is an arithmetic number, because the mean of its divisors is an integer number (562843315).

Almost surely, 2^1125686629 is an apocalyptic number.

It is an amenable number.

1125686629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125686629 is an equidigital number, since it uses as much as digits as its factorization.

1125686629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 1125686629 is about 33551.2537619684. The cubic root of 1125686629 is about 1040.2534604746.

The spelling of 1125686629 in words is "one billion, one hundred twenty-five million, six hundred eighty-six thousand, six hundred twenty-nine".