127640715 has 16 divisors (see below), whose sum is σ = 205836288. Its totient is φ = 67538016.

The previous prime is 127640693. The next prime is 127640717. The reversal of 127640715 is 517046721.

It is not a de Polignac number, because 127640715 - 2⁵ = 127640683 is a prime.

It is a super-2 number, since 2×127640715² = 32584304251422450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127640717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31597 + ... + 35406.

It is an arithmetic number, because the mean of its divisors is an integer number (12864768).

Almost surely, 2^127640715 is an apocalyptic number.

127640715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

127640715 is a deficient number, since it is larger than the sum of its proper divisors (78195573).

127640715 is a wasteful number, since it uses less digits than its factorization.

127640715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67138.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 127640715 is about 11297.8190373187. The cubic root of 127640715 is about 503.4964460704.

The spelling of 127640715 in words is "one hundred twenty-seven million, six hundred forty thousand, seven hundred fifteen".