1125163801 has 4 divisors (see below), whose sum is σ = 1131667812. Its totient is φ = 1118659792.

The previous prime is 1125163789. The next prime is 1125163873. The reversal of 1125163801 is 1083615211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1083615211 = 7 ⋅154802173.

It can be written as a sum of positive squares in 2 ways, for example, as 956293776 + 168870025 = 30924^2 + 12995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125163801 - 2⁵ = 1125163769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125163801.

It is not an unprimeable number, because it can be changed into a prime (1125163891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251746 + ... + 3252091.

It is an arithmetic number, because the mean of its divisors is an integer number (282916953).

Almost surely, 2^1125163801 is an apocalyptic number.

It is an amenable number.

1125163801 is a deficient number, since it is larger than the sum of its proper divisors (6504011).

1125163801 is an equidigital number, since it uses as much as digits as its factorization.

1125163801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6504010.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1125163801 is about 33543.4613747598. The cubic root of 1125163801 is about 1040.0923860853.

The spelling of 1125163801 in words is "one billion, one hundred twenty-five million, one hundred sixty-three thousand, eight hundred one".