127640641 has 16 divisors (see below), whose sum is σ = 139005504. Its totient is φ = 116734464.

The previous prime is 127640627. The next prime is 127640677. The reversal of 127640641 is 146046721.

It is a cyclic number.

It is not a de Polignac number, because 127640641 - 2¹¹ = 127638593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127640741) 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 15 ways as a sum of consecutive naturals, for example, 206565 + ... + 207181.

It is an arithmetic number, because the mean of its divisors is an integer number (8687844).

Almost surely, 2^127640641 is an apocalyptic number.

It is an amenable number.

127640641 is a deficient number, since it is larger than the sum of its proper divisors (11364863).

127640641 is a wasteful number, since it uses less digits than its factorization.

127640641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 127640641 is about 11297.8157623498. The cubic root of 127640641 is about 503.4963487693.

The spelling of 127640641 in words is "one hundred twenty-seven million, six hundred forty thousand, six hundred forty-one".