126720370 has 24 divisors (see below), whose sum is σ = 265337964. Its totient is φ = 43446816.

The previous prime is 126720359. The next prime is 126720389. The reversal of 126720370 is 73027621.

It can be written as a sum of positive squares in 2 ways, for example, as 124970041 + 1750329 = 11179^2 + 1323^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128817 + ... + 129796.

Almost surely, 2^126720370 is an apocalyptic number.

126720370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126720370 is an abundant number, since it is smaller than the sum of its proper divisors (138617594).

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

126720370 is a wasteful number, since it uses less digits than its factorization.

126720370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258634 (or 258627 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 126720370 is about 11257.0142577861. The cubic root of 126720370 is about 502.2833831162.

Adding to 126720370 its reverse (73027621), we get a palindrome (199747991).

The spelling of 126720370 in words is "one hundred twenty-six million, seven hundred twenty thousand, three hundred seventy".