126512646 has 32 divisors (see below), whose sum is σ = 273815808. Its totient is φ = 38737440.

The previous prime is 126512629. The next prime is 126512647. The reversal of 126512646 is 646215621.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126512647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12615 + ... + 20301.

It is an arithmetic number, because the mean of its divisors is an integer number (8556744).

Almost surely, 2^126512646 is an apocalyptic number.

126512646 is an abundant number, since it is smaller than the sum of its proper divisors (147303162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126512646 is a wasteful number, since it uses less digits than its factorization.

126512646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916.

The product of its digits is 17280, while the sum is 33.

The square root of 126512646 is about 11247.7840484248. The cubic root of 126512646 is about 502.0087801303.

The spelling of 126512646 in words is "one hundred twenty-six million, five hundred twelve thousand, six hundred forty-six".