20126125 has 8 divisors (see below), whose sum is σ = 25117560. Its totient is φ = 16100800.

The previous prime is 20126101. The next prime is 20126129. The reversal of 20126125 is 52162102.

It can be written as a sum of positive squares in 4 ways, for example, as 5769604 + 14356521 = 2402^2 + 3789^2 .

It is not a de Polignac number, because 20126125 - 2⁹ = 20125613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126129) 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 7 ways as a sum of consecutive naturals, for example, 80380 + ... + 80629.

It is an arithmetic number, because the mean of its divisors is an integer number (3139695).

Almost surely, 2^20126125 is an apocalyptic number.

20126125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20126125 is a deficient number, since it is larger than the sum of its proper divisors (4991435).

20126125 is an equidigital number, since it uses as much as digits as its factorization.

20126125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161024 (or 161014 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20126125 is about 4486.2149970772. The cubic root of 20126125 is about 272.0111596128.

Adding to 20126125 its reverse (52162102), we get a palindrome (72288227).

The spelling of 20126125 in words is "twenty million, one hundred twenty-six thousand, one hundred twenty-five".