126020511245 has 4 divisors (see below), whose sum is σ = 151224613500. Its totient is φ = 100816408992.

The previous prime is 126020511241. The next prime is 126020511247. The reversal of 126020511245 is 542115020621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542115020621 = 77471 ⋅6997651.

It can be written as a sum of positive squares in 2 ways, for example, as 76133501929 + 49887009316 = 275923^2 + 223354^2 .

It is a cyclic number.

It is not a de Polignac number, because 126020511245 - 2² = 126020511241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126020511241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12602051120 + ... + 12602051129.

It is an arithmetic number, because the mean of its divisors is an integer number (37806153375).

Almost surely, 2^126020511245 is an apocalyptic number.

It is an amenable number.

126020511245 is a deficient number, since it is larger than the sum of its proper divisors (25204102255).

126020511245 is an equidigital number, since it uses as much as digits as its factorization.

126020511245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25204102254.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 126020511245 its reverse (542115020621), we get a palindrome (668135531866).

The spelling of 126020511245 in words is "one hundred twenty-six billion, twenty million, five hundred eleven thousand, two hundred forty-five".