127640642 has 16 divisors (see below), whose sum is σ = 196499520. Its totient is φ = 62158512.

The previous prime is 127640627. The next prime is 127640677. The reversal of 127640642 is 246046721.

It is a junction number, because it is equal to n+sod(n) for n = 127640599 and 127640608.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10403 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (12281220).

Almost surely, 2^127640642 is an apocalyptic number.

127640642 is a deficient number, since it is larger than the sum of its proper divisors (68858878).

127640642 is a wasteful number, since it uses less digits than its factorization.

127640642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 127640642 is about 11297.8158066062. The cubic root of 127640642 is about 503.4963500842.

The spelling of 127640642 in words is "one hundred twenty-seven million, six hundred forty thousand, six hundred forty-two".