126425665 has 4 divisors (see below), whose sum is σ = 151710804. Its totient is φ = 101140528.

The previous prime is 126425659. The next prime is 126425669. The reversal of 126425665 is 566524621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71250481 + 55175184 = 8441^2 + 7428^2 .

It is a cyclic number.

It is not a de Polignac number, because 126425665 - 2¹⁵ = 126392897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126425669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12642562 + ... + 12642571.

It is an arithmetic number, because the mean of its divisors is an integer number (37927701).

Almost surely, 2^126425665 is an apocalyptic number.

It is an amenable number.

126425665 is a deficient number, since it is larger than the sum of its proper divisors (25285139).

126425665 is an equidigital number, since it uses as much as digits as its factorization.

126425665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25285138.

The product of its digits is 86400, while the sum is 37.

The square root of 126425665 is about 11243.9167997633. The cubic root of 126425665 is about 501.8937053719.

The spelling of 126425665 in words is "one hundred twenty-six million, four hundred twenty-five thousand, six hundred sixty-five".