126178645 has 8 divisors (see below), whose sum is σ = 151538904. Its totient is φ = 100859904.

The previous prime is 126178643. The next prime is 126178651. The reversal of 126178645 is 546871621.

It can be written as a sum of positive squares in 4 ways, for example, as 71876484 + 54302161 = 8478^2 + 7369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126178645 - 2¹ = 126178643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126178598 and 126178607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126178643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3244 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (18942363).

Almost surely, 2^126178645 is an apocalyptic number.

It is an amenable number.

126178645 is a deficient number, since it is larger than the sum of its proper divisors (25360259).

126178645 is a wasteful number, since it uses less digits than its factorization.

126178645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759.

The product of its digits is 80640, while the sum is 40.

The square root of 126178645 is about 11232.9268225160. The cubic root of 126178645 is about 501.5666129876.

The spelling of 126178645 in words is "one hundred twenty-six million, one hundred seventy-eight thousand, six hundred forty-five".