126643925 has 12 divisors (see below), whose sum is σ = 157226916. Its totient is φ = 101193600.

The previous prime is 126643919. The next prime is 126643963. The reversal of 126643925 is 529346621.

It can be written as a sum of positive squares in 6 ways, for example, as 2588881 + 124055044 = 1609^2 + 11138^2 .

It is not a de Polignac number, because 126643925 - 2¹² = 126639829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 22385 + ... + 27465.

It is an arithmetic number, because the mean of its divisors is an integer number (13102243).

Almost surely, 2^126643925 is an apocalyptic number.

It is an amenable number.

126643925 is a deficient number, since it is larger than the sum of its proper divisors (30582991).

126643925 is an equidigital number, since it uses as much as digits as its factorization.

126643925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088 (or 6083 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 126643925 is about 11253.6183070157. The cubic root of 126643925 is about 502.1823607446.

The spelling of 126643925 in words is "one hundred twenty-six million, six hundred forty-three thousand, nine hundred twenty-five".