1125126611157 has 4 divisors (see below), whose sum is σ = 1500168814880. Its totient is φ = 750084407436.

The previous prime is 1125126611131. The next prime is 1125126611171. The reversal of 1125126611157 is 7511166215211.

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.

It is not a de Polignac number, because 1125126611157 - 2²⁰ = 1125125562581 is a prime.

It is a super-2 number, since 2×1125126611157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125126611177) 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, 187521101857 + ... + 187521101862.

It is an arithmetic number, because the mean of its divisors is an integer number (375042203720).

Almost surely, 2^{1125126611157} is an apocalyptic number.

It is an amenable number.

1125126611157 is a deficient number, since it is larger than the sum of its proper divisors (375042203723).

1125126611157 is an equidigital number, since it uses as much as digits as its factorization.

1125126611157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375042203722.

The product of its digits is 25200, while the sum is 39.

The spelling of 1125126611157 in words is "one trillion, one hundred twenty-five billion, one hundred twenty-six million, six hundred eleven thousand, one hundred fifty-seven".