127665040 has 20 divisors (see below), whose sum is σ = 296821404. Its totient is φ = 51065984.

The previous prime is 127665001. The next prime is 127665073. The reversal of 127665040 is 40566721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84052224 + 43612816 = 9168^2 + 6604^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 127664993 and 127665011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797827 + ... + 797986.

Almost surely, 2^127665040 is an apocalyptic number.

127665040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127665040 is an abundant number, since it is smaller than the sum of its proper divisors (169156364).

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

127665040 is a wasteful number, since it uses less digits than its factorization.

127665040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595826 (or 1595820 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 127665040 is about 11298.8955212445. The cubic root of 127665040 is about 503.5284284806.

The spelling of 127665040 in words is "one hundred twenty-seven million, six hundred sixty-five thousand, forty".