126520778 has 8 divisors (see below), whose sum is σ = 190355520. Its totient is φ = 63068940.

The previous prime is 126520777. The next prime is 126520787. The reversal of 126520778 is 877025621.

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

It is not an unprimeable number, because it can be changed into a prime (126520777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94898 + ... + 96221.

It is an arithmetic number, because the mean of its divisors is an integer number (23794440).

Almost surely, 2^126520778 is an apocalyptic number.

126520778 is a deficient number, since it is larger than the sum of its proper divisors (63834742).

126520778 is a wasteful number, since it uses less digits than its factorization.

126520778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191452.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 126520778 is about 11248.1455360428. The cubic root of 126520778 is about 502.0195359667.

The spelling of 126520778 in words is "one hundred twenty-six million, five hundred twenty thousand, seven hundred seventy-eight".