126213025 has 12 divisors (see below), whose sum is σ = 156660732. Its totient is φ = 100869440.

The previous prime is 126213013. The next prime is 126213097. The reversal of 126213025 is 520312621.

It can be written as a sum of positive squares in 6 ways, for example, as 15374241 + 110838784 = 3921^2 + 10528^2 .

It is not a de Polignac number, because 126213025 - 2⁵ = 126212993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126212987 and 126213005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32487 + ... + 36163.

It is an arithmetic number, because the mean of its divisors is an integer number (13055061).

Almost surely, 2^126213025 is an apocalyptic number.

It is an amenable number.

126213025 is a deficient number, since it is larger than the sum of its proper divisors (30447707).

126213025 is a wasteful number, since it uses less digits than its factorization.

126213025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060 (or 5055 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 126213025 is about 11234.4570407296. The cubic root of 126213025 is about 501.6121629411.

Adding to 126213025 its reverse (520312621), we get a palindrome (646525646).

The spelling of 126213025 in words is "one hundred twenty-six million, two hundred thirteen thousand, twenty-five".