126071254251 has 8 divisors (see below), whose sum is σ = 186772228560. Its totient is φ = 84047502816.

The previous prime is 126071254187. The next prime is 126071254279. The reversal of 126071254251 is 152452170621.

126071254251 is a `hidden beast` number, since 1 + 2 + 60 + 7 + 1 + 2 + 542 + 51 = 666.

It is not a de Polignac number, because 126071254251 - 2⁶ = 126071254187 is a prime.

It is a super-2 number, since 2×126071254251² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126071234251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2334652830 + ... + 2334652883.

It is an arithmetic number, because the mean of its divisors is an integer number (23346528570).

Almost surely, 2^126071254251 is an apocalyptic number.

126071254251 is a deficient number, since it is larger than the sum of its proper divisors (60700974309).

126071254251 is an equidigital number, since it uses as much as digits as its factorization.

126071254251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669305722 (or 4669305716 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 126071254251 in words is "one hundred twenty-six billion, seventy-one million, two hundred fifty-four thousand, two hundred fifty-one".