125110821 has 16 divisors (see below), whose sum is σ = 183786048. Its totient is φ = 75072000.

The previous prime is 125110759. The next prime is 125110829. The reversal of 125110821 is 128011521.

It is not a de Polignac number, because 125110821 - 2¹⁰ = 125109797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125110829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15436 + ... + 22101.

It is an arithmetic number, because the mean of its divisors is an integer number (11486628).

Almost surely, 2^125110821 is an apocalyptic number.

125110821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125110821 is a deficient number, since it is larger than the sum of its proper divisors (58675227).

125110821 is a wasteful number, since it uses less digits than its factorization.

125110821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37652.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 125110821 is about 11185.2948553000. The cubic root of 125110821 is about 500.1477176880.

The spelling of 125110821 in words is "one hundred twenty-five million, one hundred ten thousand, eight hundred twenty-one".