1125257657 has 4 divisors (see below), whose sum is σ = 1126965840. Its totient is φ = 1123549476.

The previous prime is 1125257647. The next prime is 1125257671. The reversal of 1125257657 is 7567525211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7567525211 = 151 ⋅50116061.

It is a cyclic number.

It is not a de Polignac number, because 1125257657 - 2¹⁰ = 1125256633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125257647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853103 + ... + 854420.

It is an arithmetic number, because the mean of its divisors is an integer number (281741460).

Almost surely, 2^1125257657 is an apocalyptic number.

It is an amenable number.

1125257657 is a deficient number, since it is larger than the sum of its proper divisors (1708183).

1125257657 is an equidigital number, since it uses as much as digits as its factorization.

1125257657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708182.

The product of its digits is 147000, while the sum is 41.

The square root of 1125257657 is about 33544.8603663810. The cubic root of 1125257657 is about 1040.1213051922.

The spelling of 1125257657 in words is "one billion, one hundred twenty-five million, two hundred fifty-seven thousand, six hundred fifty-seven".