127127720 has 16 divisors (see below), whose sum is σ = 286037460. Its totient is φ = 50851072.

The previous prime is 127127653. The next prime is 127127729. The reversal of 127127720 is 27721721.

It can be written as a sum of positive squares in 2 ways, for example, as 105801796 + 21325924 = 10286^2 + 4618^2 .

It is a super-2 number, since 2×127127720² = 32322914384796800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127127729) 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 3 ways as a sum of consecutive naturals, for example, 1589057 + ... + 1589136.

Almost surely, 2^127127720 is an apocalyptic number.

127127720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127127720 is an abundant number, since it is smaller than the sum of its proper divisors (158909740).

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

127127720 is a wasteful number, since it uses less digits than its factorization.

127127720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178204 (or 3178200 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 127127720 is about 11275.0929042736. The cubic root of 127127720 is about 502.8210138287.

The spelling of 127127720 in words is "one hundred twenty-seven million, one hundred twenty-seven thousand, seven hundred twenty".