125992811 has 4 divisors (see below), whose sum is σ = 143991792. Its totient is φ = 107993832.

The previous prime is 125992799. The next prime is 125992861. The reversal of 125992811 is 118299521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118299521 = 107 ⋅1105603.

It is a cyclic number.

It is not a de Polignac number, because 125992811 - 2¹⁰ = 125991787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125992861) 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, 8999480 + ... + 8999493.

It is an arithmetic number, because the mean of its divisors is an integer number (35997948).

Almost surely, 2^125992811 is an apocalyptic number.

125992811 is a deficient number, since it is larger than the sum of its proper divisors (17998981).

125992811 is an equidigital number, since it uses as much as digits as its factorization.

125992811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17998980.

The product of its digits is 12960, while the sum is 38.

The square root of 125992811 is about 11224.6519322427. The cubic root of 125992811 is about 501.3202587652.

The spelling of 125992811 in words is "one hundred twenty-five million, nine hundred ninety-two thousand, eight hundred eleven".