126520646 has 24 divisors (see below), whose sum is σ = 224940240. Its totient is φ = 53197872.

The previous prime is 126520643. The next prime is 126520657. The reversal of 126520646 is 646025621.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126520643) 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 11 ways as a sum of consecutive naturals, for example, 6986 + ... + 17373.

It is an arithmetic number, because the mean of its divisors is an integer number (9372510).

Almost surely, 2^126520646 is an apocalyptic number.

126520646 is a deficient number, since it is larger than the sum of its proper divisors (98419594).

126520646 is a wasteful number, since it uses less digits than its factorization.

126520646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24428 (or 24421 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 126520646 is about 11248.1396684074. The cubic root of 126520646 is about 502.0193613798.

The spelling of 126520646 in words is "one hundred twenty-six million, five hundred twenty thousand, six hundred forty-six".