1125858157 has 4 divisors (see below), whose sum is σ = 1125927036. Its totient is φ = 1125789280.

The previous prime is 1125858143. The next prime is 1125858179. The reversal of 1125858157 is 7518585211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28526281 + 1097331876 = 5341^2 + 33126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125858157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125858127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5583 + ... + 47779.

It is an arithmetic number, because the mean of its divisors is an integer number (281481759).

Almost surely, 2^1125858157 is an apocalyptic number.

It is an amenable number.

1125858157 is a deficient number, since it is larger than the sum of its proper divisors (68879).

1125858157 is an equidigital number, since it uses as much as digits as its factorization.

1125858157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68878.

The product of its digits is 112000, while the sum is 43.

The square root of 1125858157 is about 33553.8098730979. The cubic root of 1125858157 is about 1040.3062944602.

The spelling of 1125858157 in words is "one billion, one hundred twenty-five million, eight hundred fifty-eight thousand, one hundred fifty-seven".