1125757649 has 2 divisors, whose sum is σ = 1125757650. Its totient is φ = 1125757648.

The previous prime is 1125757621. The next prime is 1125757679. The reversal of 1125757649 is 9467575211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118233600 + 7524049 = 33440^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125757649 - 2⁸ = 1125757393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125757679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562878824 + 562878825.

It is an arithmetic number, because the mean of its divisors is an integer number (562878825).

Almost surely, 2^1125757649 is an apocalyptic number.

It is an amenable number.

1125757649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125757649 is an equidigital number, since it uses as much as digits as its factorization.

1125757649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 47.

The square root of 1125757649 is about 33552.3121259922. The cubic root of 1125757649 is about 1040.2753366775.

The spelling of 1125757649 in words is "one billion, one hundred twenty-five million, seven hundred fifty-seven thousand, six hundred forty-nine".